- last post: 01.01.0001 12:00 AM PDT
Yeah, I've had that happen a couple times. I'm probably wrong, and please correct me if I am, but I think it's just a texture glitch with the smoke.
Either that, or while you were sleeping, Covenant crept into your room and replaced all of your grenades with green smoke frags, and are now secretly laughing about it.
But I think it's the first one.