There’s a funny list, somewhere about this. I remember one was YKYGTHABDW: You put your bra on backward and it fits better.
Now, this guy knew he was going to have a bad day when the bear attacked, but I doubt he expected his hunting partner to shoot him.
“Calm down! First, let’s make sure he’s really dead…”
You’d think a taxidermist would know better than to mess with a live bear.
“The Hunter Who Cried Wilf…”
Once upon a time, in a magical land that’s* really* fun to visit, there lived two hunters…
Well whaddya know, one buwwet weft!
One day when I was a substitute teacher, I pulled into the school parking lot just in time to see a SWAT tactical truck leaving. I should have just turned around and gone home.
No, it wasn’t anything physically dangerous. There had been an altercation in the cafeteria by two high school students with known gang affiliations, but the police presence had all the kids rattled, which meant that the good students couldn’t concentrate, and the bad students were all acting out. Substitute teachers don’t get to just put on a movie and sit back anymore. We were supposed to deliver the same lesson plan the regular teacher would have. Teaching on a campus I’d never been to before with students I’d never met on a day when learning was unlikely to happen was challenging to say the least. I had such a headache when the day was over.
I wonder if the buddy was thinking of this anecdote:
Two campers are surprised by a really pissed grizzly bear.
They take off running.
One gasps to the other “I don’t think we can outrun the bear!”
The other gasps back “I don’t have to outrun the bear. I just have to outrun YOU!”.
For some reason I’m reminded of an off-color joke with the punchline, “Lady, this just ain’t your day.”
I’m reminded of a VERY off-color joke with the punchline, “You didn’t come here to hunt, did you boy?”
The victim in the story was a taxidermist.
I would have thought the attempted stuffing was going the other way in this case. 
I believe the saying ‘bad things happen in threes’.
Now, before I get accused of being superstitious or worryingly credulous let me explain.
My theory (and it’s all mine) is that some days you are just fired up to get pissed off by the slightest thing - the car that cuts in front of you, your ticket at the station barriers doesn’t swipe first time, so you have to actually slow down for a split second, you go to the tea room and there’s a queue for the coffee machine - on a good mood day, you’ll laugh these off. On a bad mood day, everything minor is going to rile you, so you may as well go back home to bed, because there’s going to be more.
The alternative theory is that you aren’t concentrating or taking enough care, so you make stupid mistakes. You know those times you have a few more drinks than you should, and go to put your glass on the bench, or move a chair and THEN you realize ‘I’d better be a bit careful here - I’m a bit affected’. Well, sometimes you can have those moments where your concentration or attention isn’t right - could be lots of reasons, maybe the cause is not not obviously apparent, like alcohol - and you are going to make mistakes. So if you make two silly mistakes - like dropping your coffee, forgetting a meeting, or such - chances are, you’ll make another because you just aren’t functioning at 100%.