I was bumbling about on Arxiv.org and I discovered in the Fluid Dynamics section that:

a) somebody had unspent grant money left over.

b) there is a Law of Urination.

Apparently all large mammals take approximately 21 seconds to urinate. Though the standard deviation of 13 seconds makes me doubt just how much of a Law this is.

Anyway this amused me.

Edit because the video is awesome.