Glaciers crack. A tiny saber-toothed squirrel, Scrat , tries to bury an acorn in the ice. The ground splits, creating a massive chasm. Scrat falls, is chased by ice, and inadvertently triggers an avalanche. He ends up frozen in a block of ice—still clutching the acorn.
MANNY: (resigned) Fine. But don't touch anything. ice age 1 transcript
(As they continue on their journey, they encounter various obstacles, including fierce predators and treacherous terrain) Glaciers crack