adrenaline

Then our adrenal gland - an organ sitting on top of our kidneys - produces the stress-hormones adrenaline and cortisol.

I would say you feel like there's a chance to crash which gives you the adrenaline.

That might help a little bit, but normally I think when you you sit in the car, you I think with the adrenaline also kicking in your reaction time naturally, like you're really fired up.