You’ve actually just reminded me of the opposite:
I can think of one occasion where we (the IT nerds) were down the pub after work on a Friday evening when the authentication servers died. This was in dial-up days. All a little tipsy, and minus the expert on this system we had to go back to the office, learn how radius worked and figure out why users couldn’t get online. The backlog of them was large also, so the radius servers were getting hammered. Not a fun friday night.

Then there was another occasion where we (same IT nerds) were down the beach on a Sunday afternoon. Being at the beach, none of us were answering phones. I forget what was wrong this time, but we weren’t popular the next day work. Given that none of us were being paid to be on-call, I don’t feel at all guilty about this incident. I think it actually lead to the company making up a formal on-call roster.

So, computer stuff breaking leads to IT people being called in to the office. It sorta sucks, actually.