Interesting take on things...
My thing is this: If you pull your feet up, you could theoretically pull your calf muscles because you're fighting major G's. When riding Face/Off at PKI in the front seat (the ride is inverted, feet dangling, boomerang), I tried to pull up my toes going in to that first inversion. When I got off the ride, my calves were killing me. I tried to fight 4.5 G's there and lost. Mantis, in the turns and inversions, is the same way.
By bending your legs, you have to support your body weight, or at the very least, the weight of your legs if you're sitting on the seat. I don't know what kind of forces that thing pulls, but you're looking at supporting several times your normal weight, and that's gonna hurt if you bend your legs.
My position, that works every time for me... pull the harness down so it's about an inch off of your shoulders, feet all the way back, knees straight, lean in to the harness away from the back, put your hands up, and enjoy!
-------------
Jeff
Webmaster/Guide to The Point
*** This post was edited by Jeff on 2/10/00. ***