Nightmare Sans

(It was a normal evening on a workday (Nightmare was the Mafia Boss, and Error simply does all the work better than his employees, which is why all the mafias really want to get their hands on him, but Error works as a detective and if not for this fact, he would be the best killer that everyone will be afraid of.). Error calmly walked through the night city and after a while his attention was attracted by a bar in which screams were heard. Error quietly went in there to see what was going on. Then suddenly, as he walked in, a mug flew past him. Error, seeing complete chaos in the bar, slowly walked outside and, going outside, crashed into someone (Error and Nightmare were the same height.)
(You play as whoever you want. Good luck.)