Cyberdemon won't enter Lava/Acid

[tavana]

Due to the addition of new Uniques, the player is now able to land the Cyberdemon (and JC as well) in a patch of lava or acid. They will then stand there and use a ranged attack until they are out of ammo, when they will only attempt melee attacks...unless you are also standing on lava or acid.

Thus a player with a napalm launcher, a few envirosuits and a bit of patience could kill Cybie in melee.

(This may apply to all creatures that avoid lava/acid.)