Gives me a heart attack . . .

Dallas rides his bke down the hill of our driveway and everytime he does it about gives me a heart attack. He gets going pretty fast and when he gets to the bottom he turns right to go on the sidewalk. Well, I am just waiting for the day that he is going to fast and he tips over on his bike. I know it is going to happen eventually. No matter how much I tell him to be careful and slow down he still does it. I guess boys will be boys and he is no exception.