Beachgoers knew something was wrong when they heard a loud boom ring out as a paraglider spun out of control, killing its only occupant, extreme athlete Felix Baumgartner, when it crashed next to a swimming pool near the Adriatic Sea.

Baumgartner, who was known as "Fearless Felix," was most known for his 2012 skydive that broke the sound barrier. The stunt was part of the Red Bull Stratos project. Baumgartner partnered with the company in an attempt to record the highest-ever skydive.