The movies star Conor McGregor stayed behind to help get the guy back on his feet.
Deadline was on the scene and witnessed.
Deadline is out to the festival for an official statement and more details.

An ambulance on the scene Friday in front of the Paramount at SXSWRyan Fleming/Deadline

McGregor with his manager who had passed out following the ‘Road House’ world premiere at SXSW on FridayAnthony D’Alessandro/Deadline