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CHICAGO (WPVI) -- A woman was struck and knocked unconscious by a motorbike on a Chicago sidewalk. The driver stopped briefly, but left.

Surveillance video shows the hit-and-run crash outside the South Side auto shop where Catalina Gomez works as a receptionist.

About three weeks ago, the 24-year-old woman was on her way home when she was struck by the minibike.

"I honestly do not remember any of it. I remember waking up in the hospital," Gomez said.

She suffered a severe concussion, bruises and damage to her peripheral vision. The driver of the bike got off his bike and looked at Gomez, then went inside the auto shop. When he didn't find anyone inside, he took off. He didn't even call 911, Gomez said.

"It is sad, how can people be so cold-hearted as to leave somebody lying there. What if my co-workers weren't there? What if no one would have found me?" she said.