I reckon I'd squat in them
A young chap (20s?) doing deadlifts, with a 3kg plastic kettlebell.
Then he tried the two point box stance, (superman, bird dog) you know, on all fours and raise one arm and one leg. For some reason he did this unitlaterally, raising his right arm and right leg, then left arm and left leg. He just fell over repeatedly.
Big old guy (looks like he's still a pretty strong guy but I only ever see him doing cable pulldowns and wandering around chatting up other gym regulars, very little activity that might make you sweat or get stronger) came over and loaded the prowler right behind me while I was doing cleans by dropping a pair of 45s and a pair of 25s from waist height down the upright poles which was noisy as shit and seemed kind of douchey and unnecessary.
Then he absolutely disappeared (I was looking around for him between sets of cleans and didn't see him anywhere). On my way out a good 5-10 minutes later I saw him tying and untying his do-rag repeatedly in a mirror over by the dumbbells. Wonder if he ever actually pushed the prowler? I would be pretty much positive he didn't unload it.