They're on a
celebrity BUS tour.
The Big Bang Theory Season 12, Episode 18
since that Korean church BUS
crashed through my front window.
The Big Bang Theory Season 7, Episode 13
Yeah, that sounds fun!
A party BUS party don't stop!
The Big Bang Theory Season 9, Episode 13
by going into the bathroom
at the BUS station.
The Big Bang Theory Season 10, Episode 6
People move away from her on the BUS.
The Big Bang Theory Season 2, Episode 12