Scrat, the monomaniacal sabretoothed squirrel, tries to bury his acorn in the ice but the ice seems to have other plans for this poor prehistoric critter.
The human baby won't stop crying so Sid is forced to change his diaper.
Manny, Sid, Diego and the baby slide through a series of ice tubes in a wild, prehistoric, roller-coaster ride.
Scrat tries to hide his acorn high up in a tree during a thunderstorm (not a good idea).
Manny and Sid return the little human baby to his father in a touching scene.