See, now I would never draft off of a vehicle. They can slam on their brakes and you go smashing headfirst into their rear bumper and through the rear windshield. When I do go down a steep grade on a busy street, I always take the lane and give myself enough room to hit the brakes should the cars in front of me suddenly stop. If I can't see in front of them, I slow down. No need to turn my thrill ride into a 1-time event.