They found on Sat. that if the shoulder harnesses wouldn't lock down completely the ride would full stop, (not the only reason, but one they could control). So they added a test seat on Sunday to pull anyone who's harness didn't fit right so the ride would have fewer breakdowns. I'm sure they'll lighten up after a bit more testing and tweaking. But for now, safety first, (that and they'd like the ride to run for longer than 30 min before breakdown)