This is nuts. Denise Mueller-Korenek set a world record for riding a bicycle at 184 mph! Her special bike is towed up to a speed of about 157 mph, then the tether is released and over the next 2 or 3 miles she pedals up to 184 while in the slipstream of the towing vehicle. Just incredible! Read more about the amazing feat HERE
Here's some more about the build up to the attempt.