What's the dumbest gun related mistake you've ever made?

[Rigon]

made a mistake shooting the glock 42 today... the slide caught my hand pretty bad, no stitches needed, but it hurt like hell lol.. damn big hands and small guns don't mix.

[sana8410]

ah i remeber ,when i first started years ago, i forgot that mosin nagants won't extract unless the round has been fired

got up to clear weapon so i could go downrange. didn't visually or digitally check. racked bolt back, forward, and pulled the trigger. boom. i always check visually and feel for a round now.

nobody was on the range, but it was a really fucking stupid mistake.

[Nathonas]

Locked my finger inside the barrel of a gun at a shooting gallery when I was a kid. I still have a scar from it. The gallery owners said they never saw that happen before 

[orsotheysaid]

Went to a shotting galore, tried to load a 9 with 10's.

[StarStruckEllipse]

Not as exciting as the other stories, but when I was new to shooting, I sort of casually pointed the pistol at my instructor and he freaked the fuck out.  I learned my lesson though.