In Michigan (hell for all I know, everywhere) you can make a left turn on red if it’s onto a one-way street. Goodgodalmighty, the thrill I get when I turn in front of that long row of cars facing me, stuck on the red… whoo-hooooooo! I feel like I’m doing something wickedly illegal, even if it isn’t, technically, a violation. It just feels like one.
And yourself?
Sort of similar to your “I’m being bad” frisson (is that the right word ?) is the sheer joie-de-vivre experienced upon being the first to notice and take advantage of a newly opened register while in line at the supermarket.
Changing clothes without bothering to pull down the shades gives a little thrill, too.
Kicking kittens, I guess.
Flying around with the BF in a very old, rickety fabric and wood plane, circa 1961 (Piper Colt). There is no lock on the door, and said door has been known to pop open in mid-flight. We do have lap belts, though. Well, thank goodness for that.
Last time we went up the brakes went out. Whee!
(Actually, he’s an awesome pilot. That plane listens to him, baby!)
That’s right, it DOES listen to me. Why do you think the door popped open and scared you silly(er)? 
I get inordinately smug when I dig up an obscure fact on the Web. Google is my bitch. whipsnap
If Google is your bitch, what the hell is it to DDG? She plays Google like most people play the acoustic skinflute.
I get a crazy thrill out of a really good parking spot. A really good parking spot will make my whole damn day.
When surfing the net, looking for pictures, I find great new never-seen pictures of King Aleksandar. RRRRROWWWRRRR!!!
“Flying” on the skycoaster. Phenomenal adrenaline rush with zero risk.
Paddling a kayak off the Laniel dam on the Kipawa river in northern Quebec. The flow off the dam carves a hole in the pool below, so as you are shooting down into it, it seems like you will never find your way through. Once at the bottom the force of the water either propels you through the giant wave and back up to the surface, or holds you and gradually lifts you up along the frothing face of the wave back to the surface. Either way, both the flying off the dam on the river’s flow, and the working back to the surface in the massive wave, provide for a tremendous adrenaline rush. I’m shaking just thinking about it. Think of the wildest part of the most exciting roller coaster ride you have ever had, and then realize that it is a snore by comparison to flying off the dam into the hole on the Kipawa.
Yet there is almost no risk. In many years of doing this myself and watching other do it, I have never once seen or even heard of someone being injured. A few have swallowed a bit of water to no ill effect, and one fellow ran the wrong sluiceway and broke his boat by missing the pond, but did not injure himself. Strange and wonderous things, often including injury, have happened to many people as they continue down the river, but as far as running the dam goes, there has never been an inury. Huge rush – little if any risk.
I saved $61 at the grocery store yesterday on the weekly bill. Made my entire day (my hubby’s, too)! 
Sheri
Yes, this could be on my list, too. I don’t often use coupons, but when I do you’d think I was ripping off the store. I feel so deliciously naughty, like I’ve gotten away with something. Wow! $.25 off mandarin oranges! I am taking these guys TO THE MAT on price!
Just a few-
*Speaking french in France and being understood.
*Finding change in a soft drink machine.
*Hitting the ball in the fairway.
*Having my dog come when I call her.
*simultaneous orgasms.
I’m easily thrilled by many mundane things!
whacking my kid sister (knowing that if she starts wailing ONE MORE TIME Dad will personally tear me limb by limb)
climbing trees
climbing walls
climbing just about anything
jumping from somewhere more than twice my height
going on the SDMB when i’m supposed to be doing homework
that’s all i can think of for now…
When I need to make 67 copies of something, and I grab exactly 67 sheets of copy paper just by eyeballing it. In my head, I’m acting like I just won the lottery, but of course I appear cool as a cucumber. I am the Sublime Mistress of the Copy Room, oh yes.
It just about made my year when one of my work study students said “Gee, how do you do that?”
When I complete the entire NY Times Sunday crossword puzzle without cheating.
I can’t believe I’m admitting this.
GKW inspired me to remember this one:
Being asked (in Taiwan), in Chinese, for directions.
Answering, in Chinese.
Saying “Oh, my God, he understood me.”
Eating Oreos for breakfast. Heck, any meal consisting entirely of desert. Mmmmmm. Malnutrition
Driving barefoot. Somebody, somewhere told me it was illegal. So I’m on a long car trip, and sometimes, at a rest stop, I just slip it off and drive naked[sub]footed [/sub].
Aaaaah.
Okay, I had to look up the barefoot thing. This page says Not illegal per se but you might get ticketed. Yay! I get to keep my pathetic thrill!
When I put petrol [sub]gas[/sub] in the car - not looking at the price thingy on the pump - and it stops exactly on a pound [sub]dollar[/sub] boundary.
I really can’t believe I just admitted that.
On a similar vein, when I find I have exactly the right change in my pocket for whatever I’m buying, and I don’t have to break a note.
[begin obscure music humor hijack]
She should learn flesh horn; then she could double.
[/end hijack]
Tossing something into the trash from across the room. Two points!