Big Smoke is in a fortified crack house with four floors between him and the front door, and the door needs a SWAT tank to open. Carl and Sweet go in together and the mission works upward through the building to the penthouse.
Then the lights go out, then the building catches fire, and then Tenpenny takes a fire truck and Sweet ends up hanging off the back of it. It pays $250,000 and it is the end of the story — the last mission, the last of C.R.A.S.H., and the last thing Carl does before Grove Street is Grove Street again.