Spilled Oil

Here's a short PSA by MAKE. Displaying some excellent 2D fluids animation:

Kieron Helsdon on Animating Explosions

The aim of this old CG Talk article is to show the variety of explosions that exist and to give a visual framework for animating them. It's in five parts and not bad for FX reference, check it out here.

The Works of Chris Graf

Here's a few more FX samples from Master Effects Animator Chris Graf.

























Here's his final show reel, marvel and drool over the astounding sense of design, timing, color schemes, and fluidity in his work.