Non-Newtonian motion of corpses

In Doom, a player or monster killed by a weapon or by blast damage acquires momentum, which can result in certain kinds of counterintuitive motion. These include ascending staircases, sliding along high ledges at a uniform speed until they fall off, making the "oof" sound after falling off a ledge, and activating walkover linedef types (such as teleporters, crushers, and "trapdoor" exits).