I need help asap!!?

well if your first ride was scary you need to incorporate that somehow into your story, you could do something like, "Although the ride was thrilling, it was still gut wrenching. When my bike started to pick up speed while I coasted down the hill, in the back of my mind I was chanting to myself, Don't fall, don't fall. I kept thinking it over and over and soon it became like a mantra to me." And keep going witht that, or however you feel is best.