Oh wow... I have never had that happen... However, one day on the range, I was proned out squeezing off rounds with the M249 SAW, and some how my ammo chain, back lashes and double feeds into the reciever. Next thing I know, Pieces of chain are flying all over me, and these things are HOT!!!They fall down the back of my shirt, the next thing I know I am doing this sort of "Ants in my pants" roll around on the ground... The range boss, comes walking over, and in his best John Wayne he goes "Well, partner, It looks like yer gonna have ta get a new shirt... Now run along and call a medic pard."

Moral of the story... Always flip the collar up opn your ACU's, thats what its there for... use it...