The 9-year-old kid who fainted onstage with Chris Brown but was fortunately scooped up by the singer before he fell says ... it all went down because he was starstruck!
Parion McCoy tells TMZ ... it was a stroke of luck he was invited onto the stage with CB while he was performing "Loyal" in the first place, but once the boy got up there and shook Breezy's hand -- it was just too much for him.
The young kid's doing fine now, and tells us it's the first time he's passed out in his life. His mom says he's the biggest Chris Brown fan there is ... and she hopes they can set up a meet-and-greet to thank him for his inspiration.
Better be ready to catch Parion again if it happens ... just in case.