Mansion of Madness Boss Glitch

From The TimeSplitters Wiki

When you get into the dining room in the Mansion of Madness level in TimeSplitters: Future Perfect, the doors will lock and The Deerhaunter will destroy the wall his head is in and attack you. Usually this isn't an exceedingly difficult battle, but there is a simple way of defeating him. Simply go back into the wall that The Deerhaunter came out of, and he will be unable to attack you due to a glitch that does not allow him to follow you back into the wall. From this point the battle is simple (simple aim at his huge head and fire away!).