Cool GIF's

I've been inspired by some of the cool animation gifs that have been floating around blogs like Tumblr recently.

Here's an assortment of cool ones I've collected. I have no idea who the authors are, and they're just provided for enjoyment and inspiration, not for commercial use. If you or someone you know is the creator of one of these, feel free to contact me in the comments and I'll add credits or remove it, whichever uyour preference.