Got it a bit wrong today, working in a courtyard in the old town of Angouleme for an apartment block, anyway at lunchtime this guy (a resident) comes in and was a little aggressive, saying that we'd cut down healthy trees, usual bullshit, I got a bit lairy right back and it ended nastily.
He stalked off and one of my groundies said "you should have stayed calm, just said you're following the specs and left it at that" he was right.
I caught the guy on the way out apologised, he was ok with that.