Step 1 : Introduction to the question "8. 'You might have seen a housefly, maybe even a superfly, but I bet you ain't never seen a donkey fly!'"
...1. The Grinch 2. Toy Story 3. Monsters, Inc. 4. Shrek Donkey (voiced by Eddie Murphy) says this when he gets hit on the head and some magic dust falls on him. The magic dust makes him fly.