Oh not much with hindsight. A couple of things:
Had a phone enquiry for the programme I run from someone who wanted to register but who didn't meet the entry requirements. I was trying to explain to them, politely that they weren't eligible for the course, but that there was an alternative they could do, and they slammed the phone down. I was trying to help them.
Had a consultation meeting with one of our teaching groups over changes/improvements to the programme, and one of the professors publicly berrated me essentially for the actions of my predecessor. Wouldn't even listen to my explanation, just went off on one, slagging me, the programme, the school etc off. It wasn't necessary really.
As I say it's nothing much but twice in one day at the end of a long week where I have tackled, and occassionally solved, problem after problem, taken big decisions, dealt with loads of difficult queries etc just pisses me off.