The way we feel gravity is by the way we interact with our surroundings. That is one reason why divers can perform intricate twists and somersaults. . Riding on each rail is a frame holding several seats. At the foot of the tower, riders are strapped into those seats and and then the frame is pulled up to the top of the tower. At the appropriate moment, the frame is released and plunges down, in what is essentially a free fall.
Free fall is a weightless state.
That, however, is in addition to their own weight mg, making the total force 3mg, or 3 gravities. Suppose V is the velocity achieved at the end of the free fall. That is one reason why Cape Canaveral was chosen as the prime launching site, as was the European site at Kourou, French Guiana. Suppose instead we have a high pressure area, with air flowing out.