And that's when the rider is required to make the ultimate life decision: choose to continue living or push the "FALL" button and die.
So how exactly does one physically die by rollercoaster? The science behind it is pretty simple: spin fast enough and hard enough and your brain won't get enough oxygen to keep functioning. The vertical rolls of the coaster would essentially create enough centrifugal force on the body that the blood rushes down in the body instead of up to the brain.
The condition has a name: It's called cerebral hypoxia. And it's often a side effect of other activities like deep-water diving, flying at high altitudes in an unpressurized cabin, or even exercising at high altitudes.
As for what it feels like, we can only guess, but Urbonas' research has led him to come to the following conclusions:
"...if you are lucky, or rather g-force-resistant enough to be awake [after the initial fall], your vision may blur, lose color (greyout) and peripheral sight (tunnel vision), even disappear completely (blackout) together with hearing. Eventually, this experience - accompanied with disorientation, anxiety, confusion, and, most importantly, euphoria - is crowned with GLOC (G-force induced Loss Of Consciousness), during which the body is completely limp and vivid bizarre dreams occur such as being in a maze and unable to get out, or floating in a white space, not knowing who you are, why you are here, etc."