LOL, rivka!
I think the problem is that the viewers know Clark is Superman, so all of this is seen as evidence of his super powers. But if you were on the street and saw a guy stick his foot out of the car, I guarantee your first thought wouldn't be that he was Superman slowing the car down. I know I'd be yelling, "You idiot! You wanna snap off your leg at the ankle?!" And when the car slowed down, I'd assume it was because the brakes worked, not because the guy slowed it with his foot.
