Originally Posted by Agent Cooba

If event itself appears in other place, but in same level, instead of fancy MCE you got another Caterpillar. Same with other events, e.g. you want to place a bee in crate, but you don't want neither MCE nor anywhere but in crate, hide bee in inaccesible place.

If you don't want Caterpillar in crate, remove Caterpillars from level.