The man, who said he was celebrating his niece’s birthday at Castles N’ Coasters in Phoenix, told NBC affiliate KPNX he was riding Desert Storm, a double-looping roller coaster, when his lap bar unlatched just seconds after the ride began.

The man was celebrating his niece’s birthday at Castles N’ Coasters in Phoenix last Sunday when the safety bar on a double-loop roller coaster unfastened.