I'm thinkin, alternating sensations of weightlessness and being pressed upon, maybe a bit of synthetic paranoia/fear to complement the "rollercoaster" ride experience. I don't know how you guys do it, but I imagine if hallucinations could be introduced without overcomplicating things, one would be almost certain to visualize extreme motion-type visuals... FTW
EDIT:
I just saw another post titled "Rollercoaster"
and for a moment I panicked, thinking I'd yet again been slow on the draw. Not so, thankfully
MY concept is the actual physical sensation of G-Force manipulation as though you are riding a roller coaster or other radical-motion vehicle. I do NOT mean an emotional or psychological roller coaster ride.
