In the episode "crabs a-la mode" the "Crusty Crab" was frozen over by plankton messing with the thermostat. After Mr Crabs starts to sell frozen patties and the Crusty Crab is obviously frozen over (patties are being used as ice-skates and hockie pucks), a crabby pattie lands on spongebob's nose. The pattie, which should be frozen at this point (all of them are), is seen flopped over spongebob's nose as if it was not frozen or has suddenly dethawed.