Apparently I can do anything in my sleep. According to my wife I have:
Carried on a conversation (numerous times), sleep walked, just get out of bed and walked around a bit before laying back down, although sometimes I got up to get another pillow/blanket without waking up (numerous times), and on at least 3 seperate occasions I have had sex with my wife without waking up! :eek: Once, after we had already had sex before falling asleep. Apparently, I’m not bad when I’m sleeping either. 
With a babushka. Remember everyone in the dream was wearing a babushka. Even the men. And everyone looked really serious and grumpy.
So it was a frowning, helium-voiced bridesmaid speaking German in a babushka (and dressed as a chipmunk if you feel that would be à propos.)
I’m tired. I got no sleep. I kept giggling after I initially woke up.
I did this once.
I was dreaming that a dog was chasing me, and I was running. When the dog caught up with me, he lunged, and I turn and kick in a last-ditch effort—
BOOM
I immediately awoke to see that my knee went right through the wall. The impact resounded throughout the house, and my mom asked about it the next day. My knee was surprisingly okay.
I’ll also hum in my sleep, usually without knowing it. I would do this often when sleeping over at a friend’s house—all of a sudden I’d hear “SHHHHHHHH!”, and then I would be confused for a second until I realized that my vocal cords were engaged. I would then say nothing and go back to sleep, all the while hoping that I wouldn’t start humming again—usually I did it once more.
Okay…first let me say that this thread has me laughing so hard that I am actually snorting. I don’t do that. 
I have actually gotten used to Hal’s sleep flailing. There was a time when I would have bruises all over me and people actually thought Hal was hitting me. I tried to explain to them that he did it in his sleep, but I don’t think too many people believed me. I have found that I now fall asleep with my back to him and if I turn over at any point during the night, I subconsiously place a pillow over my head and another over my…ummm…breast area.
Oh, I dated a guy kinda like that. He was a body builder – all natural, no steroids, so he was very lean and very toned, but still at 6’ 1" and heavily muscled, it was like lying next to a mountain. I think he often had the “Omigosh, I’m falling!” sensation, because he used to sort of jump/jolt in his sleep. If he had his arm around me, his arm would fly up and nearly tear my head right off! The first time it happened his forearm whacked me in the jaw quite solidly. So I also developed the Protective Sleeping Posture.
Who was the Doper who tired to wake up his wife one morning saying “Honey, you’ll be late for work,” and she answered, “I don’t have to go to work today, today is triangle day!”…?
My husband tells me I often laugh my butt off in my sleep. The first time it happened, it really freaked him out, but he’s used to it now and it makes him laugh.
The husband, on the other hand, is a sleep kicker and accidental (at least I like to think so) smacker. He’ll either kick me in the butt so hard I feel like my head’s going to hit the wall, or he’ll try to spread his arms out and wake me up with a smack to the head, or he’ll just rest his hand on my face. My favorite, though, is being woken by a firm smack to the ass. It should make me mad, but it’s too funny. All of a sudden, I’ll feel a giant hand whap me in the butt, then I’ll try to figure out what happened, and I’ll start laughing once I’ve figured it out.
Well, that wasn’t me, but I certainly have said things like that. I think Hal’s favorite was when I asked him where he put the pink ceramic elephant that used to be on the TV (we don’t have a pink ceramic elephant). I only talk when he’s trying to wake me up and I obviously say things related to my dreams. Hal thinks it’s funny and tries to carry on the conversation with me. I NEVER remember these conversations (I think he’s making them up ).
My wife is a sleep shrieker. :eek:
About once every couple of months she’ll have a dream where something really scary happens, and she’ll let out this terrified series of wails.
The first time it happened, I almost wet my britches. I had no idea what was going on, and I instinctively rolled over on top of her to protect her from the serial killer/ghost/zombie/sasquatch that was attacking her in my sleep addled mind.
I’m looking around, trying to identify the threat and figure out the best way to kill it, my heart is triphammering in my chest, and I can barely breathe. About a gallon of adrenaline has been dumped into my system, and I’m humming like a wire. She cracks an eye open and looks up at me.
“What?”
“You were screaming!”
“Oh…nzzzz…snzzzzz…”
And she’s out like a light.
Still scares the holy beejaysers out of me every time she does it too.
Ooo, I have to confess I scream at night sometimes. You see, when I first drop off to sleep, the switch that connects my mind to my body sometimes shuts off before I’m entirely asleep. So I’ll be awake, in this haze, and I’ll try to move my body and limbs, and I think I;m doing it, and I try to shout, and I think I’m doing it, but nothing’s happening. So when I finally manage to switch back on, I scream.
My boyfriend, on the other hand, does two things. One is he talks, which isn’t bad, more amusing. Once when he was heavily into Heroes 4, he said “Can you turn me into a castle now?”
But the other thing he does is smack his lips. In the middle of the night. UGH. I hate it when people do it at the table, it’s much worse to be woken up to eat. :shudder:
I laugh in my sleep all the time and sometimes I’m laughing so hard I wake myself up. Like many of you mentioned whatever makes you laugh isn’t nearly as hysterical awake as it was when dreaming.
One time I had a dream about Jack Nicholson accepting an award or something at a pier. As he bounded up the stage with his hand out to shake hands he fell right off the pier. It was hilarious and I woke up guffawing! I was laughing so loud I woke up my fiancé. She had no idea what was so funny but she lay there laughing with me until I was able to catch my breath and tell her why I was laughing.
When my fiancé first moved in we were still getting used to both sleeping in the same bed and I jammed my knee into her butt at least every few nights. Usually she sleeps so soundly that she doesn’t notice but one time I practically kicked her out of the bed! She woke right up yelling “OUCH!”
Sorry honey! 
I’ve done this before. I once had a dream of disco-dancing monkeys following Charlie’s Angels. I started laughing so hard that I woke myself, my husband, and our two cats up out of a sound sleep.
It was funny as hell. Of course, my husband thought I was choking - it took a minute to tell him I was laughing.
And I posted this dream on the SDMB several months ago - I didn’t get this many responses! Hmmph!
E.
When my fiancee and I were working in an insurance call center we would end up saying the same thing over and over all day. Then, he would say it at night. Woke me up one night telling me the virtues of our different payment plans.
Yup, that’d be sure to get me howling in my sleep.
But I recall a fairly lame dream once got me laughing so that I woke myself up. I’d gone back to my elementary school and on one wall they had all these old, candid photos framed on display. One old photos was from, maybe 1979 or 1980 and it had this kid, Peter (the class uber-nerd, who used to cry all the time), smoking a cigar as a fourth-grader.
A little surreal, maybe, but not something I would think I’d find particularly funny.
Nonetheless, I woke up curled into a ball from laughing so hard, gulping for air from the peals of unbridled laughter.
Uh, yeah. Peter smoking. Now that’s comedy. :dubious:
Helium-sucking bridesmaid? Funny.
Disco-dancing monkeys? Very funny.
Fourth-grader smoking a cigar? Er, really, not so much.
Does sleep impair your sense of humour or something?