A protester was hit by a car in Ferguson, Missouri on Tuesday during a demonstration marking the second anniversary of Michael Brown's death.Witnesses said that a car sped through a group of protesters who were blocking a street during the demonstration marking two years since the unarmed black 18-year-old's fatal shooting by a white police officer.They said the car struck a young man so hard that he flew into the air. As the car drove away, shots were fired, they said.The man appeared to be badly injured and was put into a private car to be taken to a hospital, she said.Police responded to reports of gunfire but had found no evidence that anyone had been struck, said Ferguson spokesman Jeff Small, who declined to speculate about why the shots were fired.