Circus Highway Crash: I'm not sure if it's only my own copy, but I'll just assume it's not, because this game is not...the most stable. In the very beginning of the Circus level, on the highway, DO NOT DIE. If you think you will, quicksave the moment you successfully load in. If you die before hitting a checkpoint, respawning you at the start of the level, your game will crash when respawning, killing your run. However, with the exceptions of Heresy and The Final Challenge, this is a non-issue because of the bastignatore allowing you skip the highway with ease. However, when playing those two categories, Be careful of the hammer-throwing zombies, those guys are VERY dangerous, especially on the highest difficulty, I'm pretty sure they're an insta-kill no matter your health. Oh, and be careful of the dwarf as well. Nasty little bugger.

Surfing Softlock: On the surfing arena mentioned above, there is a way to accidentally softlock your game, where you must die and restart the whole surfing section. This occurs when you kill enemies before the boards that are supposed to drop can do so. Killing them too quickly will cause the next wave of enemies to not even spawn, stopping the entire section. You can tell if boards are about to drop because they will jiggle up and down for a second before they sink. Sometimes, when this softlocking glitch happens, the boards that are supposed to drop instead fly up into the sky. Weird.