Masses of LMFAO fans gathered at a series of free concerts in Indianapolis and caused a number of party rockers to get trampled.

Ouch!

WTHR has reported that, of the 780,000 guests, 11 people were injured and 22 were placed under arrest. That's actually not so bad when you think about the numbers; organisers were careful to take measures to ensure it didn't happen again and, by all accounts, the big night of the Super Bowl seems to have gone without a hitch!

The police targeted mostly alcohol-related crimes, so we're guessing revelers were getting thirsty after a night of hardcore shuffling.

We wonder how the crowds reacted when LMFAO hit the halftime show with Madonna for a little 'Sexy And I Know It' - if they were this crazy for the small concerts, we can only imagine how absolutely off-the-rails people got for the big show!