Skydiving for sport or recreation is among the most popular ways mankind has devised to laugh in the face of our own mortality. As insane as it might sound to jump out of a perfectly good airplane, somewhere in the neighborhood of 350,000 jumpers execute close to 3 million jumps each year in the United States alone.

With more than 8,200 people jumping out of planes each day in the U.S., the fact that the news cycle isn’t inundated with thrill seeker obituaries is a testament to just how safe we’ve managed to make falling from the sky at 120 miles per hour. In fact, according to expert estimates, you have around a 1 in 100,000 chance of dying if you were to go skydiving tomorrow.

That’s a big number, so for added reference, consider this: according to the National Safety Council, you have about a 1 in 96,691 chance of being convicted of a crime and executed in the United States. Of course, there are circumstances that can dramatically increase the risks associated with skydiving. Often, experienced jumpers identify and eliminate these risks ahead of time… but there are some things there’s just no planning for.

Such was the case for Christopher Jones back in 2015. Midway through an Accelerated Free Fall program, Jones departed the aircraft just as he had each time before, but as he fell past 9,000 feet, he suddenly had a seizure.