[KeeperOfTheCode]

Jolly's newest forces! Mines! Get too close, they blow up.

But seriously, there should be a whole cavern built to be 'unstable'. It would add something interesting to the game. All enemies in that cavern would have abilities that would cause huge damage to you, but had a small countdown for you to get away, and would have backlash for the attacker. If too many 'backlash attacks' are used in a certain area, that area will begin a collapse. Get out, or you'll be crushed!