There's definitely technical/fancy tomfoolery. But I'm also just surprised in very low-tech ways.

I once had someone draw a very elaborate stick figure fight in CAD for an entire 74 minute period instead of the high priority project his teammates were waiting on.

It's tricky for me in the engineering project classes, because I'll often be very deeply involved with one group teaching a new task or skill. 90% of the time the other groups will make good progress, but the other 10% yields interesting surprises. I definitely am more careful to show up unexpectedly more and to carefully look at screens, not just to shrug when they look OK-ish from 15' away.

Ha I had a classmate in one of my design courses who would make stunning art in Paint while we were all diving into Blender xD