Perkawinan Nyi Blorong (Crocodile Transformation)

Thanks to Marc for suggesting this...unusual scene. All I know about Perkawinan Nyi Blorong is that it's an Indonesian film from 1983 and certifiably insane. Here we see a chunky dude eat several eggs, causing him to roll around the floor and experience what looks like a male pregnancy before ripping off his pants to reveal a yellow diaper. Then, after further overacting, he turns into a crocodile via charmingly awkward practical effects. Though working with a third-world budget, the filmmakers tried to imitate Rick Baker's style, and they demonstrate that budget practical effects are always more fun than budget CGI.

The video cuts off before his final form can be seen, but you can continue onward here.