Well, OK, one last effort to talk to twocicle. Why is your definition of anything THE definition. Why are you not "getting the gist of it". Any old high speed descent fits most of your points,single or tandem. What sets the "tandem screamer" apart is something unique to tandem, and I'll maintain that a moderate descent with the tandem spinning out in 53/54 - 11 is the true screamer. Ask you single bike friends what makes a tandem scream. My best buds have learned to watch for the jump, 'cause they know it is a very narrow window or they're off. Yahooooo!