I take my 370 lbs very seriously. I was a tad bit hesitate to jump up and down on him like I wanted to but I did anyways. I enjoyed standing and bouncing on his chest with my full weight. Just like his back his chest was small. I manuevered myself on top of his chest and kept my balance by holding onto the wall and the couch in front of us. It was a very hot day and I got tired within a few minutes and decided to stop.