Legendary stuntman Felix Baumgartner may have had a midair heart attack when he plunged to his death this week, injuring a resort employee as he crashed into a busy pool area, according to local reports.

The Austrian daredevil — who in 2012 became the first person to skydive from the edge of space –reportedly complained of feeling ill before his fatal paragliding jump Thursday in the Italian coastal town of Porto Sant'Elpidio, Italian news outlet Il Resto del Carlino reported.

Felix Baumgartner, a legendary skydiver most known for his 2012 stratosphere jump, died at 56 in a paragliding accident. Getty Images

Two hours before the crash, Baumgartner posted an Instagram Story with the caption "too much wind." Instagram/@therealfelixbaumgartner

When he crashed into a bustling swimming pool full of children, an air ambulance was called — but never used because Baumgartner's heart had completely stopped, the outlet said.