What's the silliest mistake you've made in the Level Editor?

[Kman]

This is what Compounds are for, kids.

Then the compound glitch occurs where all objects implode onto themselves and the undo command no longer applies.

[Play Darth Vader video here.]

So much rage... SO MUCH RAGE...

DAMMIT FRICTIONAL WHY DON'T YOU FIX THESE THINGS.