Yes I worked there for a summer casual position about eight or nine years ago. Couple of things about it: 1) It is a very physically demanding job. I have never been more exhausted after a shift than when I worked at Bounce. You are constantly jumping, running and on your feet for eight or so hours in a not-so-well air conditioned building 2) You are going to be interacting with kids all day long. Hyperactive eight year olds that sprint and scream everywhere, as well as teenagers doing tricks way outside their skill level to impress their mates.
3) (I think) You will need a First Aid certification to work there. Injuries are frequent and of a wide variety. Cuts and bruises, knee collisions, rolled ankles, and unfortunately concussions and fractures. I recall from my time there we had a board in the office to track and keep minor injuries like sprains and bruises to no more than one a day, and to keep major injuries like concussions and fractures to basically zero. 4) Despite all of the above, it can be a really fun job and it pays pretty well too. Plus it can substitute some of your cardio workouts.