me and my cousin have found a new glitch. if you throw a grenade the right distance away from a machien gun turret, then the grenade will explode and destroy the turret but the rod in witch the turret was siting on will still be there. Go up to the rod and an imadinary useable turret will be there and you can still use it. (note that the if the grenade is to close then it won't work, also if the frenade is to far away then it won't destroy the turret). You have to get it just right, or it won't work. the easiest way i find is to go on coulgulation and throw a grenade beside the teleporter and it is just easier to get the genade togo where you want it to go.