Slimemold
Here's a wonderful series of slimemold videos. (thanks to Tim).
http://youtu.be/9zAGp_7Xhss - waves
http://youtu.be/bkVhLJLG7ug - guy who's researched for 70 yrs
http://youtu.be/OX5Yiz38fgY - crazy spirals in this one
http://youtu.be/eTWNF-Rc3kk - protoplasmic streaming