Eleven people were injured Friday night as an estimated 50,000 people flooded downtown streets for a free outdoor concert by the band LMFAO. Indianapolis Public Safety Director Frank Straub said none of the injuries were serious, most involving shortness of breath or scraped knees. "The crowd, everything is great," Indianapolis Department of Public Safety Capt. Kevin Givens said Saturday night. "We've not having any problems with overcrowding."