Revealing mistake: When "Krebbs" the koala is discussing with his other friends in the cell. If you look closely, you can notice a blink in the outline in the "Krebbs" nose. It's a clear ink & paint mistake of the blur line.
Wilbur: Welcome to "Albatross Air: A Fair Fare From Here to There." You get it?"A fair fare." It's-It's a play on... never mind.