The Grey's Anatomy 2011 promo that aired at the end of last week's episode left little doubt that when the show returns next month, a major disaster awaits the surgeons.

Just what type of situation are we talking about, though?

"There's a massive situation at a school, so all the training that Owen put into place suddenly makes people much more ready to handle this sort of thing," Kevin McKidd says.

Guess that mock tragedy he simulated may really pay off.

Steve Marsi is the Managing Editor of TV Fanatic. Follow him on Google+ or email him here.