Trapped by Wrestlers

Date: 6/28/2017

I'm at the outdoor park in the town centre of where I live. I'm watching a group of men who are inside a giant inflated orb. Within the orb the men are wrestling with soft inflated cubes. They exit the cube and ask if I'd like a go at wrestling the cubes. I climb in and before I reach the cubes realise that the men are holding the entrance to the giant orb closed so I can't get back out. I try to force the doorway open but can't. I'm not sure why they're trapping me but I don't like it.