Andretti Autosport driver Kyle Kirkwood was left upside down after a frightening incident at the Indy 500.
The Amercian was in contention for a top-five finish when running at the front with less than 20 laps to go.
But he was collected by Arrow McLaren driver Felix Rosenqvist after the Swede had slid wide at Turn 1 when being disturbed by aero wake from the overtaking Josef Newgarden.
Rosenqvist's damaged McLaren span and slid across the track at Turn 2, collecting the left-rear of Kirkwood's car - sending the Andretti into the SAFER barrier, flipping upside down.
The incident was made worse by Kirkwood's wheel being ripped off, flying over the catch fencing and narrowly clearing the spectator-filled grandstand.
Red flags were understandably called for with 12 laps remaining whilst the track was cleaned up.
Kirkwood was extracted from his car and walked away seemingly unscathed, whilst the tyre flew past the crowd and into the car park, hitting one of the stationary vehicles.