Zac Efron Breaks Jaw in Bizarre 'Accident'

Zac Efron broke his jaw. His jaw is wired shut. It supposedly happened when he slipped in a puddle of water at his home. That's Zac's story.

Zac has been in rehab twice this year for cocaine abuse. He also had been dabbling in Molly.

In addition to the broken jaw, Zac apparently also suffered a big ol' gash that had to be closed with stitches.

Maybe it's true, but it's a very weird story ... slipping and breaking your jaw in a puddle of water.

We're told Zac -- who has been a hard partier for years -- has been struggling to stay clean.