Me and Jeff (screechnowl) had a quick little converstaion with a ride op one time while we were waiting to be dispatched. He told us to keep our hands down and inside the car at all times, and all that other mumbo jumbo. Jeff said," YEA RIGHT". The ride-op said "We have to say that for insurance reasons, hell I put my hands up on the coaster.". That is the only reason they tell you to keep your hands inside the car. It's plainly for insurance. Even though it looks like you are able to get your arm cut off by the tunnel or a headchopper on the island turnaround, you still have plenty of empty space between you and the object. I've noticed on Gemini, there are spots where you could grab the supports, but why would you, that would just be dumb, to much friction, lol, your train has a greater chance of loosing, lol.
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"The shade, is a tool, A device, a saviour"
My own summer (shove it)-Deftones