My cat Mitten, once balanced himself on the
rim of a washtub, which was about one half
of an inch wide! The purpose? Puss wanted to
catch the tropical fish which were housed in
the washtub-converted-into-a-pond.

And with his fourth paw, this undersized little feline version of Satan actually caught a fish and scooped it into his mouth before he could be shoo-ed off! Amazing cat... :-)