I am guilty of the clean out, but for the following reasons. 1. To let the guy ahead of me realize I might use him for traction if he does not MOVE. 2. To let a scorer know that a rider is at the section. 3. To let the rider who is next in line,know he better go or be passed at the entrance. 4. That I am pissed off at myself halfway through a section. Spectators and scorers beware. 5. My throttle is actually stuck and I am riding the section anyway I can! I have had this happen several times.