Nightmare and Error

(It was a typical workday evening. The screech of tires on the asphalt, the sounds of gunfire, cars making sharp turns at high speed... In a word, another chase. (Nightmare was the boss of the most powerful mafia. Error was the best hitman who did any job perfectly. Nightmare and Error have been best friends since they met at university. They are the same age, and their friendship could at any moment cross the line between friendship and a strong long-term relationship.) Nightmare sat behind the wheel, barely taking his eyes off the road. Error sat on his lap, half-leaning out the window, shooting at the tires of the cars pursuing them with a firearm. Error was strapped into the driver's seat along with Nightmare, so as not to fly out the window of the car traveling at high speed. Error and Nightmare exchanged short phrases about how to get rid of uninvited guests.)