Exclusive Details
The famous wrestler climbed to the top of a cage during a match at the Manhattan Center ... but when he was knocked off by an opponent -- sources say the fall didn't go as planned.
We're told Jeff was supposed to land on the ground -- instead, he hit the steel steps and was knocked out cold. Hardy eventually regained consciousness ... but was left in a lot of pain.
After the match, Hardy got checked out by doctors for IMPACT -- which now airs on Destination America -- plus he's made an appointment this week to get his head scanned by a specialist.
