Goose Creek police say an armed man robbed a convenience store of $228, about $150 less than he would have taken had he not run into the doorway and dropped some of the money on his way out.

Police say the robbery happened at 10:25 p.m. Friday at Big T's convenience store at 402 St. James Ave.

Witnesses told investigators that the suspect wearing all-black pants and shirt pointed a silver-colored gun at the clerk and demanded all of the money. The clerk said the suspect grabbed the money and ran into the door when he was leaving. He dropped $150 in various bills, according to an incident report.

A second witness told police that he was inside the store playing a video game when he saw the suspect enter the store with a handgun. The witness said he ran out of the store as fast as he could during the holdup. He told police he ran toward Barrington Boulevard and noticed the suspect following him before changing directions, the incident report says.

Officers found a black mask and three $5 bills lying along Kensington Drive.

No one has been arrested.

The suspect is described as about 5-foot-7 and 130 pounds. The clerk couldn't pinpoint the suspect's race because of the mask, the report says.