Complex sentence: Opportunity comes their way and they find themselves working there, however on their first night they cause a disturbance and wind up working at the gas station again, when a gangster (William Davidson) brings his car in for servicing.
Split into simpler sentences: Opportunity comes their way and they find themselves working there, however on thier first night they cause a disturbance and wind up working at the gas station again. While there, a gangster (William Davidson) brings his car in for servicing.