I had something similar, playing an airsoft game with my usual group, it was me and another kid with his Bolt action rifle, he picked a spot in the bushes, and I did some scouting, and told him ok, im getting in posision across from u in the other bushes. Well there we are waiting, and I start getting a little itch in a very uncomfortable spot, so of course im reaching and making a little noise doing so, and PAM, my own teamate shoots me in the side of the head with his .30's not 10 feet away. Thank god for full mask cuz that would have kncoked me right out man, I swift kicked him in the ass for that one