Okay, so I was recently playing Metroid Zero Mission and this occurred to me. In one area, you have to shoot out part of the floor to allow a jumping monster to come out from beneath, which you can then freeze with the ice beam and use as a platform to reach an otherwise inaccessible missile pickup. Despite the obvious illogical parts of that statement, there is something else. The floor section you must shoot regenerate after a few seconds, which occurs before the ice beam effect wears off on the monster. When it does wear off, the monster will one again return THROUGH the floor without destroying it, but be unable to jump back up from underneath.