Example: Drop Attract on a monster or two and leave the area, preferably with other monsters handy to combat the hapless victims. Come back later and they'll reactivate with the same AI as you last saw them - None carrying a Curse, but most engaged in a frantic death match, while you sit back and cackle with glee (except for the dead ones).

Example 2: I was recently forced into a temporary retreat in the Chaos Sanctuary after having landed a Venom Lord with Hit Blinds Target from a thrown javelin attack. Upon my return I discovered said Venom Lord taking a profound interest in a wall, even though the yellow orb over its head had long since vanished. The beastie never woke up to the fact my character was standing nearby unnoticed and only saw the merc when the merc ran into melee it.

The practical applications are limited, so this one is virtually little more than humour value.

*A spark, then a flashing brilliance, with the accompaniment of the divine orchestra.*

Have a nuke-u-ler break, have an AtomicKitKat!

An interesting point is that unlike the other AI effects described in this thread, if you leave the area and come back, the paralyzed monster will have recovered.