Mancubus fireball clipping

A wall, pillar, or other solid object usually blocks the fireballs, but not always; from time to time, a fireball will fly straight through an apparently permanent feature, possibly ambushing an unwary player on the other side.

Though this is often more noticed with the Mancubus because of their projectile's normal speed, it can be noticed with other monsters, often Imps, when playing in Nightmare! or with the -fast parameter on.

Demos

 * [[Media:d207mfcb.lmp|The Mancubus fireball clipping bug]] (file info) on MAP07: Dead Simple