We're all just bus drivers

So today my oceanography substitute professor, who has a really thick accent, was talking about waves (my real prof is playing around under the sea this week) and he says what I thought was to think about being "in the bus stop"...until he said to fill it up with water...and I was wondering why we'd fill the bus stop with water...then he put up a diagram of a bathtub on the screen...LOL
Well, I don't feel too bad...Amanda thought he said to fill it up with people...or something like that...