He and his tiny bladder can take the BUS.
The Big Bang Theory Season 9, Episode 8
But I can't take the BUS.
They don't have seat belts.
The Big Bang Theory Season 2, Episode 5
by going into the bathroom
at the BUS station.
The Big Bang Theory Season 10, Episode 6
Oh... can't you take
the BUS to the dentist?
The Big Bang Theory Season 5, Episode 15