Does the Brain have an upper limit on dizzyness? Yes, several.

I dance alot. Mainly stuff with lots of spins in. You get used to them, through training. We mainly spin clockwise, and it shows. I can't go fast enough clockwise to have to stop, but can anti-clockwise.

Plus, the cause of dizzyness is quite simple. It happens when the fluid in the balance organs in the inner ear has built up too much momentum, and keeps moving when you stop. It can't build up too much speed, as the forces needed to do so would kill you. It, therefore, cannot take that long to stop moving, and allow you to recover. I think.

BTW, I though the whirling dervishes were from the Sundan.