Re: How to Kick @$$ at Left4Dead :: Ultimate Resource Guide The thing with lighting the tank on fire and running, is that firing after he is light on fire does nothing. Damage doesn't stack, so anything else is pointless. IF ur playing Expert it, and someone startles the witch, fuck it. She will just run around for a bit and run off. If someone startles the witch, and dies for it (one hit insta kill) it is better to just let the witch run off than have someone else go and die.