Car Creeping on a Red Light

So the other day, I noticed something that always boggles my mind. Imagine being stopped at a red light. Along side you another car stops at the red light in their lane. But instead of staying still, the car starts to creep...creep...creep up closer to the intersection. Why? I figure it's either impatience or an attempt to anticipate the green light and be the first to cross the intersection. But have you noticed what usually happens when people start to creep up during the red light? They're usually really slow off the line because they probably weren't ready to press the gas.

Of course there are exceptions, those being the people that are really in a hurry and creep up and then are quick to gas it when the green comes. But by my unofficial count, I'd say 95% of the time, the person is super slow to go when the green light comes. So the lesson...creeping up on a red light will likely make you less ready to go when it's green and more likely to make you look odd and impatient to other drivers.