Gary Rohan hospitalised after sickening collision at MCG

WARNING: Some viewers may find the following video distressing.

Sydney Swans star Gary Rohan has been stretchered off the MCG after landing awkwardly and knocking himself out against Carlton.

MATCH CENTRE: Sydney v Carlton

MATCH REPORT: Carlton stun Sydney as Swans go 0-6

Rohan was attempting to take a mark over his shoulder in the third quarter of Saturday's match when he jumped and tumbled over the top of Carlton player Sam Rowe.

Rohan flipped in the air before landing extremely awkwardly on his head and neck.

The young Swans star lay motionless for several minutes before being stretchered off the field.

Rohan was conscious and talking in the change rooms, but was taken to hospital as a precaution.

He has reportedly suffered a very heavy concussion but has full range of movement in his limbs.

"From my understanding he's having precautionary scans," said Swans coach John Longmire.

"He's moving okay, he's awake.

"It obviously didn't look good and it looked as though he was in a bit of trouble for quite a while.

"That's the thing you notice - normally when a player cops that sort of hit they're able to get up pretty quickly, but he certainly didn't look like he was moving too flash."