The person who invented the trampoline probably had some very useful, necessary need for it. They probably never intended it to be the machine of mass destruction that it has become today. But if they did, then they are somewhere laughing right now.
Every trampoline comes with a weight limit printed clearly on the box that it came in. Every person in America ignores that weight limit, and most of the time, nothing happens at all. That is not the case for this portly woman.