"Demand Performance" may be the motto for MTU Detroit Diesel, but it was a command performance at the GM Heritage Center at the company's recent sales and after sales recognition event. Aerial acrobats and illusionists from the Detroit Fly House, music and dancers by Simone Vitale Entertainment and Productions, and a pair of dueling pianos were highlights of the evening of high energy entertainment. The GM Heritage Center frequently hosts recognition events, sales and marketing meetings and annual dinners.