Stunning video shows the moment a roller coaster rider in Arizona made the quick decision to climb out of his seat — right before the coaster was about to make a big drop — after he says his safety bar came loose.

A man whose roller coaster safety bar became unlatched said, 'I had mere seconds to act on whether I stayed on or got off.'

Terrifying video shows an Arizona man jumping out of a roller-coaster with seconds to spare after he says his safety belt failed right before the big drop.