I used to see Chris all the time, either in the truck, driving past the school or just generally prowling around outside his house (we used to walk up from Hove Station every day around the time it was extended. But I didn't include that because, I'm pretty sure EVERYONE has a mundane Chris...
No toilet-based encounters, but:
Been in a lift with Russell Brand.
Followed Jonathan Ross down to his dressing room by accident at the 2006 Comedy Awards and he told me where to go (like, literally, not to fack off).
Saw Connor Goldson in a Heathrow business lounge.
Stood at a bar in Brighton...