Wallrunning

The wallrunning bug can occur when the player runs along a wall (either normally or by straferunning) while touching it. Occasionally, in this situation, the player suddenly finds himself accelerated to a rather greater speed than he can normally attain; this lasts until he stops running, or encounters a corner, or changes direction (e.g. by being hit by a monster).

Demo files
[[Media:d213wrb.lmp|The wallrunning bug]] on MAP13: Downtown