Not that exciting but....
While doing my PhD I ended up in the group of (unpaid) BOFHs who looked after the lab's IT equipment and generally helped out with IT support stuff. I was overrunning a bit on the PhD and get a surprisingly stern talking-to from my supervisor about completing my actual research work and stopping the (technically voluntary but someone has to do it) BOFH/IT Support stuff.
Literally the next day he phones up to ask me to help get his printer working!
He had the decency to look at the floor while I was there which could have been embarrassment but could also have been to avoid my massive grin.
(and he did say thank you)