hat tips peur, the scientific GIF community, dump.fm and OIE
animation - others
gritty pan gif
since i was talking about sara ludy's pan gifs, i tried to optimize one and this happened
crispinMaxjellyfishX2_transit2crop
Modification of a Sterling Crispin GIF. It's not really a jellyfish - that's a descriptive word so I could find the file again.