Skydiving can be a lethal adventure. You can die.
Whether you jump tandem or solo, unexpected situations can occur, such as having your primary or reserve parachute fail to open, or if you happen to be this guy, you completely get knocked unconscious from a seizure mid-free fall.
Possibly the scariest moment of my life. On the 14th of November 2014 while doing stage five of my Accelerated Free Fall program I have a near death experience. At around 9000ft I have a seizure while attempting a left hand turn. I then spend the next 30 seconds in free fall unconscious. Thankfully my jumpmaster manages to pull my ripcord at around 4000ft. I become conscious at 3000 ft and land safely back to the ground