Did you see the time ROBIN WILLIAMS gatecrashed a STEVE MARTIN interview?!

In the middle of a philosophical discussion around mathematics and physics between Bob Osserman and comedy great Steve Martin, a muffled heckle can be heard coming from the audience. After a little investigation it is established that the guilty party is none other than the great ROBIN WILLIAMS.

MARTIN, who presumably knew WILLIAMS was in attendance calls back:

Say something intelligent Robin?

To which WILLIAMS replied:

Did you know the human body was designed by an engineer…..cos only an engineer would put a waste processing plant next to a recreational facility.

What follows is an off-the-cuff improvisational tête-à-tête of the highest order. Enjoy.

Priceless.