I did a solid day's work, which stretched into the evening. We got a load of stuff done. There was a last minute problem to solve. I offered my colleague the chance to solve it, because it looked like fun. He declined - sensibly taking his weekend instead. I grabbed the problem for myself in his place. It would be a chance to do some coding and also a chance to do it properly. A sensible design plopped into my head instantly and I set about making it. I was gripped.
An end of day meeting threatened to take the time away, so I worked late. The meeting was a chance to positively air thoughts and reflect on how to collaborate better. So it would have been churlish not to spend the time on that. So I worked late. I would have worked later, but there was curry to get and it was to arrive about the same time as I would, at the moment when I was summoned to "come now".
So I got curry.
I resolved to finish the coding before the weekend was out, but decided not to go back to the office that evening. That would have been too extreme.