Servo, 5 g's sounds a bit high to me. The ride designers don't like to go much higher than 4 because at that point the ride gets down right uncomfortable if not a bit painful from the g's. One other thing to keep in mind is that the "average" human can black out at 5 g's. The more short more athletic person can endure a little more.
But I have to think that you butt is going to be firmly glued to the seat in the first turn around carrying all of that speed.