Oh OK after having it on my mind for a day I remembered better what the weird gym class net thing was. It wasn’t dodgeball, it was some sort of teamwork exercise where we split off into teams of like 7 or 8 and competed to see which team could get more people from one side of the net to the other, by going through the gaps cleanly without touching the sides and each team could only use each gap once.

So there were gaps so high up you had to boost each other through them, or even lift people over your head and pass them through to teammates that had already gotten through easier gaps, there was kind of a problem-solving element to it in figuring out who to use for each gap in what order. I remember I was the last one on my team and the best gap left was fairly small and waist-height, too high to step through so I took an arms-by-your-side Luigi dive through (there were big, fluffy, pole vault-type landing mats on the other side)