Bomp

Bomps are enemies found only in Whomp's Fortress in Super Mario 64. They are large trapezoid-shaped stones with large eyes on their faces. They act as obstacles; if the player runs by too soon or incorrectly timed their movement, the bomp may push them and they will fall into a bottomless pit.

Enemy Discoloring
Blue Bomps, also known as Sleeping Bomps are inert until Mario steps in front of them, at which point they enrage and rapidly push after a brief cooldown.