Mythbusters - Tory tests the myth of whether a big-rig drafting effect applies to bicycles.
"Like Lance Armstrong, Tory puts the pedal to the... pedal. Soon enough, he's at 20 mp/h but it's not long before his heart is pumping like a techno-trance song. Kari, looking like an extra from Star Trek, measures his speed. So Tory may not be King Of The Mountains but in a little over a minute he's home."