I would've jumped myself, come to that
One of my interviewers yawned alot, stared at the ceiling.
The other asked me "How was your journey?" then said "I don't want to hear about that!" as soon as I opened my mouth.
Offputting, resented it, but I guess I was prone to worrying about the littlest things, and it wasn't such a big deal.
During my second interview at Cambridge there was a cat on the desk and the interviewer had to move it because it was clawing at my work.
i was told by some students at cambridge that one girl threw up in her interview and got an offer! not sure if they were winding me up though.