Bowler Hat Guy revealing to Doris his brilliant plan to get revenge on Cornelius Robinson...with toilet paper. Doris comes up with the idea to steal the time machine. Bowler Hat Guy says: "My plan was brilliant! ...But we went with Doris'."
Both Wilbur putting on the Carmen Miranda hat, catching Lewis totally by surprise, and eventually realizing it's nuts and switching it out.
Wilbur: Dude, I can't take you seriously when you're wearing that.
The best part? Lewis goes around the house and meets the rest of Wilbur's family, who somehow manage to make the fruit hat look normal.
For the DVD, every time the director's commentary gets interrupted by Bowler Hat Guy and Doris.
The deleted scene where we get to see how Wilbur talked Carl into helping.
When trying to figure out where Lewis went, Doris and Bowler Hat Guy split up on the roof of the orphanage to look for clues. Doris finds time travel residue and DNA of Wilbur Robinson. Bowler Hat Guy is absolutely delighted with his find... a stick.
Lewis pulling out the "I am your father, young man" detail to win an argument against Wilbur near the end of the film.
The "Cornelius comes home scene" full stop. Franny's deliciously flat "Ohboy...", Bud's casual "Well, he's home early", Cornelius bursting in yelling about the time machines being gone only to spy Lewis, his younger self who waves sheepishly and after being fingered for causing the whole mess, Wilbur's remark of "Ratted out by the old lady. Harsh."