A man was rushed to the hospital after driving his car under a semi truck's trailer.
The accident happened at about 11:00 Friday night on E 1/2 Road in front of City Market.
Troopers say Charles Clark was driving a white sedan when he may have suffered a medical problem which caused him to crash into the King Soopers truck and slide underneath it.
Clark was taken to the hospital where Troopers believe he is in critical condition.
Clark reportedly works as a security guard at City Market and knew the driver of the semi.