He desperately rushes to get to the Krusty Krab (Additionally forgetting his left shoe behind), even jumping over an unfinished bridge that is over a cliff to get there on time. The next morning, SpongeBob wakes up and finds out he overslept. He drinks a glass of warm snail milk, which causes him to fall asleep within moments.
After speedily running around, it does not tire him.
However, he is so excited about going to work the next day that he cannot fall asleep. In the beginning of the episode, SpongeBob is getting ready for bed.