Phineas and Ferb - Season 3 Episode 50
Sci-Fi Pie Fly

Phineas and Ferb create their own flying saucer to help solve the mystery of a recent rash of crop circles. Meanwhile, Candace tries to give up her tattling habit by taking a "me" day, and across town, Dr. Doofenshmirtz challenges the local pizzerias "37 Minutes or its Free" rule by using his "dough-blow-inator" to generate a powerful current of air to hold the pizza dough aloft indefinitely.