Like Charles said, there's lots of blame to pass around on this one. The gym gets blamed for no one manning the floor to keep watch, we can't comment on anything else because maybe the kid was shown the different equipment and how to use it before. As sad as this is, the kid (bless him) also has to get some share of the blame because if the stops are available he should have set them before getting on the machine. If the stops aren't on the machine then I hope that gym has good insurance because they're going to get their pants sued off them. On the other hand, if it was a freak accident (like a heart attack) then that's just entirely tragic on its own.