Scrat is the tetargonist of the Ice Age franchise.
Scrat is a squirrel who is totally obsessed with acorns, however he never manages to achieve one and instead causes himself massive physical pain. Scrat is also responsible for several important occurrences in the Paleolithic ice age such as Pangea and the formation of Death Valley. Scrat's desire for acorns has proven to be very self-destructive, and to everyone around him, even destroying an entire civilization of Scratlantis.
Scrat inadvertently causes the break up of Pangaea.
In the film's epilogue, Scrat discovers the island on the map, known as Scratlantis (a parody of Atlantis), but his uncontrollable urge to hunt acorns in the acorn-rich city inadvertently causes the entire island to sink when he unplugs an acorn drain holder; Scrat is then ejected into a newly created desert landscape, through which he screams.