I threw a revolver loaded with 1 bullet off the roof of the fire station tower (didn't have enough inventory slots to carry it down), onto the roof of the fire station, picked it up again and stood at the top of the ladder leading to the ground level, threw it off and watched it disappear into the ground. Couldn't see it anywhere visually or in vicinity tab. Lay on the ground, went 1st person, can't see nothing.