One thing the Teenage Mutant Ninja Turtle movie had going for it was gigantic turtles. They were definitely giant, green turtle-esque looking monsters. And now watch the best scene from the entire movie (that was basically improved) get created.
ILM's VFX supervisor Pablo Helman released a video to Wired with the rest of his FX crew showing how they turned a bunch of guys in white suits into giant turtles running around in Manhattan. It's impressive. Also how about the best scene in the whole movie actually being improved from the actors screwing around on set. YIKES. Ah well, watch the movie magic insanity now.