In many of Tim Burton's films, an egg is cracked in some weird way. It's sort of like a signature, I think. I've spotted this in "Edward Scissorhands," where the scientist's cookie making machine cracks an egg, "The Life Aquatic," where an egg is cracked as the climax of some Rube Goldburg design, and in "Corpse Bride." Try to spot it in his other films, too, though I believe there are exceptions. Blink and you'll miss it!