INDIANAPOLIS – Overwhelming “human gridlock” in Indianapolis’ Super Bowl Village is causing police to rethink crowd control before the game.

Eleven people were injured Friday night as an estimated 50,000 people flooded downtown streets for a free outdoor concert by the band LMFAO. Two other people were injured Friday separate from the concert-going group. Indianapolis Public Safety Director Frank Straub said none of the injuries was serious – most involved shortness of breath or scraped knees – and were well within the daily average of 10 to 15 injuries reported at the village so far.

To guard against overcrowding disasters Saturday night, police said they tweaked their plans, adding options to close off streets or intersections to cars and people, and to direct people around crowded areas.

Police made a total of 22 arrests Friday night, mostly for public intoxication.

One police car was damaged after concert-goers climbed on top of it to get a better view of the stage.

Rumors of stampedes, stage collapses and gunshots abounded on Twitter as crowds grew Friday, and Straub said Indianapolis Metropolitan Police officers investigated them all and found no problems. He said reports of officers using pepper spray, Tasers or force of any kind were all false. Super Bowl Host Committee spokeswoman Dianna Boyce said despite its overwhelming size, the crowd was good-natured and caused few problems.

“It looked like a lot of people having a good time,” Boyce said. “When you have 200,000 people, you have to continue to keep everyone safe.”

Kaitlyn Blacha of West Lafayette and her friends went downtown to see LMFAO about 7 p.m., but Georgia Street was already so packed that they couldn’t even see the stage. She said the crowd was mostly young, drunk, college kids. In the span of an hour, she moved about a block and was pushed from behind several times.

“At times, I was pinned so tightly I didn’t even have to hold my body up,” Blacha said. “Nobody could turn back. We were just stuck.”

About an hour after arriving, she said security officers began ushering crowds down nearby alleys to alleviate some of the pressure on Georgia Street. She went down an alley and tried to return to Super Bowl Village but entrances were blocked off. She and her friends instead headed for a nearby bar.

“I never felt scared for my safety,” she said. “It was Friday night, and we were going downtown.”

In preparation for Saturday night’s free outdoor concerts from the bands Umphrey’s McGee and O.A.R., Straub said between 650 and 700 officers would be on duty downtown, 50 more than originally planned.

Saturday’s rainy weather may also have helped thin crowds, although showers were expected to end by late Saturday night.