I found this article (courtesy of monique-coleman.net) its the cast sharing a few moments from the set…
Here i’ve picked a few of my faves :]
FOOT FIASCO!
Zac Efron: I don’t know how it happened, but my foot slipped through a theatre seat during a scene and I couldn’t get it out! It was so funny because they had to take the seat apart to rescue my foot. The cameras had to stop rolling and people were brought on set to unscrew the bottom of the chair. I was mortified!
FALL OUT BOY!
Corbin Bleu: Whenever you’re dancing with an ensemble, something is always going to go wrong. Tons of the cast would fall over or trip over each other’s feet – but it was me who fell over the most. The camera would always catch me, which was really embarrassing. Look out for the falls on the DVD’s blooper reel!
SWEATY BETTY!
Monique Coleman: I had to have three copies of my High School Musical
3 prom dress because I sweated a lot on set – and it would show through three layers of clothes! I’d have to run to the room next door to change, which was pretty embarrassing. But by the end of the first day, everyone knew I was really sweaty, so I didn’t bother running next door. I would just stand in the corner of the room with a blow dryer drying out the dress!
BLACK-EYE BUDDY!
Vanessa Hudgens: I’m so clumsy. It’s terrible! I managed to hit Ashley several times by accident on set – and I felt awful about it. At one point, I hit her in the eye and she had to put ice on it. Another time, I whacked her in the face with my elbow. I was always bashing her – but it was completely by accident. Oops!
Head over to the site to check out the rest of the hilarious moments on set…
http://www.cinemablend.com/dvdnews/High-School-Musical-3-Brings-Up-Bloopers-15146.html


Corbin Bleu: Whenever you’re dancing with an ensemble, something is always going to go wrong. Tons of the cast would fall over or trip over each other’s feet – but it was me who fell over the most. The camera would always catch me, which was really embarrassing. Look out for the falls on the DVD’s blooper reel!
3 prom dress because I sweated a lot on set – and it would show through three layers of clothes! I’d have to run to the room next door to change, which was pretty embarrassing. But by the end of the first day, everyone knew I was really sweaty, so I didn’t bother running next door. I would just stand in the corner of the room with a blow dryer drying out the dress!
Vanessa Hudgens: I’m so clumsy. It’s terrible! I managed to hit Ashley several times by accident on set – and I felt awful about it. At one point, I hit her in the eye and she had to put ice on it. Another time, I whacked her in the face with my elbow. I was always bashing her – but it was completely by accident. Oops!
http://www.okmagazine.com/news/view/11980