No "mishap", but I was taken out at 50 yards.
My older brother sent me out to "set up" the target.
It wasn't the target that was set up.
Crossman 1500, something like that, lever action pump model. I walked out, I heard him racking it, chunk-ka-chung-ka-chung-ka-chung......
I bent over to set it up.
THWACK! Right in the side.
I got him back a couple years later.
We were at a BBQ at the river, he was about 50 yards away, I picked up a rock, did a wild ass guess and threw it as hard as I could, arced it about 45 degrees up, it sailed, sailed, sailed went through the tree he was under, he heard it hitting the leaves as it zeroed in on him, smacked him right in the center of the forehead.
I felt bad about it.
But, he never shot me again.
We laugh about it.....now.

Pro tip, never clean snow off of the muzzle with your left hand while accidental pulling the trigger of your pump BB gun when you are 12 or your finger print card might look a tad funny for life.

I did basically the same thing and shot a metal fence post. It ricocheted and hit me square between the eyes. It didn’t hurt much that I remember but it scared the crap out of me. I never knew it was something that could happen until then.

One of my friends had one of those spring loaded pistols where you'd pull back the slide and then push it forward to cock it.  I think it was Halloween or something.  Well he was across the street from me and I just remember throwing something up in the air and right about the time I caught it I got popped in the forehead near my temple with a BB.  He tried to say he shot up in the air but I wasn't having it.  

To say I was pissed was an understatement.  I was potentially 2" from losing one of my eyes.  There is no telling how life would have been if that happened.  I chewed his ass up and down and I hope he realized how stupid his stunt was.

Ha!  Oh shit!  Too many stories but none need told!!!

My dad wouldn’t let me have a BB Gun. Said it was a gun, but no one respected them as such. Ironically enough, my babysitter’s sons had them, and I was accidentally shot in the cheek. Thought it just broke the skin and didn’t penetrate, but a week later had to get BB removed, down below the jaw line.

Same logic applied to Mopeds. A motorcycle with not enough power to get you out of situations.

Looking back he was right on both points.

Shooting pigeons in an old barn, window had been replaced with shatterproof plastic so I knew I wouldn't break them. Pigeon lands in windowsill, my brother shoots. Misses. Ricochet right back and hits me between the eyes.  That was an old red Ryder from the 30s or 40s I suppose. Trigger return spring broke so you had to hold the trigger forward while cocking it and don't touch it until you're definitely ready.

Brother has it cocked and loaded, puts it to the ground butt first too hard. Shoots self in hand.

Ah, BB gun fights......

They get out of hand fast and no one lost an eye but I ended up shot in the neck from a daisy powerline with 8 or 10 pumps. BB was in my neck. Squeezed it out and tried to hide it from mom and dad but they noticed at dinner time.
Told them I got stung by something (I did) and they put the orange monkey blood methiolate (sp?) on it that really burned like hell.


That orange shit in the glass bottle was some good stuff.

I still have a bb behind my left ear just under the skin. 50 years ago my older brother shot me when I scared him in the woods. I was facing him when he shot me, blessed I didn't lose my eye.