My wife was making fishmouth-like faces at the fish in a tank at Cabela's in Michigan when one fish swam up and did it back to her! Then the fish appeared to wait for her to come back to the window ! We should have gotten more video to see if that fish would have done it again YouTube - FishFace
Nice one....when in town I'm a bit of a dog whisperer, telling dogs in their own language and with the proper accent where to go when they p*ss me off, never works unless used in conjunction with a couple of stones though. :D