Zac Efron has been talking about the injury he received while making High School Musical 3.
A revolving hallway like a 'hamster wheel' was responsible for his lost footing and heavy fall
"Kenny Ortega, the director, told me to rehearse it but also filmed it at the same time. It was crazy! I fell over a few times. At one point it reversed direction and I wasn't ready - I ate it then!"
Efron's 21st birthday is just nine days away.