Some idiot forgot to pull it out in time.
Burnt nose hair.
A: A cello burns longer.
Me: Twitter. Padre: Wow, if I had a nickel for every time . . .
Grow old!
Pull the pin and throw it back.
Pull out
Hey forget about it
He was Russian.
He wanted to try out his new air brakes.
Doc: Damn it I told you I'm a mine worker not a doctor. It's my name, idiot
Some douchebag forgot to pull it out in time.
In all 3 cases, someone forgot to pull it out.
Failure to pull out in time