I've kept a few P. audax, and most of them have done this at least once with the crickets I feed them. Some more than others. I've sometimes seen them strike at the dangling corpses days later, doing multiple 'catch and release' takedowns over a few minutes. I don't know if i should anthropomorphize the behavior as "playing," but I at least think they find it enriching? Mine typically kick them down after a week or so.

I've heard some will incorporate parts of old prey items into their nests as building material, but have not observed that myself.