If you watch the angle from behind, he was clearly bumped and the collision sent him sprawling.
https://streamable.com/lus34

Except Bird and Magic both benefited from criminally stupid franchises (the Cavs and Warriors, ironically) gifting them Hall of Famers. I wonder how many people think the Showtime Laker championships are less meaningful because the Ted Stepien gave the reigning NBA champions James Worthy for peanuts, forcing the NBA…