2 weeks after the events of the second film, Sid takes a school of children out on a camping trip from home, only to find that he is not a very good guide and the children are bored. In a cameo appearance, Scrat has swallowed his acorn and is struggling to keep it down. He coughs it up and it is stolen from him. The camping trip leaves some of the children somewhat traumatized. Sid tries to pick a flower, but somehow this has led to a tree falling, which then hits a rock, which causes a chain reaction and hits a series of larger rocks, until eventually hitting a large iceberg. The iceberg then carves out a u-shaped valley, which Sid later names the Grand Canyon. Afterwards the kids get so annoyed with Sid that it ends with them tying him up. 20,000 years later on present day, it shows a father and son beaver looking over the Grand Canyon with the son asking who made it. The father replies "Nature or a Deity."