I could sit on MS from open to close and be fine. I've been on it three times in a row during summer which, as you know, equals intense heat. No problem at all.
I wonder how fast the centrifuge has to spin in order to feel the G's you feel during the ride. And if the carts actually flip over during the sling shot. I love that ride, it's a feeling like no other and I'm so happy the Imagineers made it. It may not get the lines that TT does, or Soarin' for that matter, but people will still go on it.