Zac Efron, breaks jaw...

Zac Efron Breaks Jaw In Freak Accident

Zac Efron reportedly fell in a puddle of water at his home and broke his jaw. Currently it's wired shut and Zac is sticking to the accident story. He also received some stitches for a cut he got during the accident.

Zac has been in rehab twice this year for substance abuse issues so some are worried that accident was a result of his hard partying.

What really happend ? 

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.