Two people were hurt and two others were arrested after a speeding pickup hit a bump near College Park, throwing two men from the pickup bed about 10:30 p.m. Monday.
Police found the two victims lying on the ground and two men fighting when they arrived at 220 College Ave.
One of the victims may have been seriously injured, according to Rapid City police spokeswoman Tarah Heupel.
Police are still investigating to see if he was run over by the back wheels of the pickup. The other victim was up and speaking with officers at the scene.
According to witnesses, the pickup was speeding when it hit a dip near College Park. Two of the three people riding in the pickup bed were ejected, said Heupel.
When officers arrived, the pickup's driver, Patrick Dreamingbear, 26, of Rapid City was trading blows with one of his passengers, Patrick Garcia, 46, of Rapid City. Police could not find a female passenger who left the scene.
Dreamingbear was arrested for driving under the influence, reckless driving and driving with a suspended license.
Garcia was charged with threatening law enforcement. He was also arrested on an outstanding warrant for sexual contact and failing to appear in court.