If you use the artifact that lets you teleport while you are a pig, then that can revert you back to your normal state, even if you are turned into a pig right away also.
Also, the pig throws green flechettes like the Fighters *grenade style* of flechettes. The pig can still use the Disc of Repulsions that help keep it alive also. Even the Icon of Defender and etc.. so all is not lost when you are a pig, you still have options

Hexen 2, you turned ppl into sheep, hehe. And in Heretic you turned them into CHICKENS! haha.