I've spun around once, it was near a tight curve for which the outer tangent was the lake, thinking that I was going to crash and die of the cold and freezing water: I've turn to myself, and simply laughed. It wasn't a forced laugh, it wasn't a small laugh, it was a roaring laugh that knowing that if I was going to die, then I'd might as well die laughing.
Then my car hit the railing that was clear from the lake area, and seeing that I was still able to drive, I've drove on. To this day you could still see the little skid marks that were left behind as the result. I laugh a little bit to myself to remind that my life is limited, and that I should always lurk moar.
Ahaha. Yeah, my first reaction was just MUST STOP CAR and then after that it was ok. Last time, when I was in the thunderstorm and couldn't see anything or hear anything for thunder, I went into a crazy fight or flight mode and slammed my foot on the gas. Nearly killed us both. It's nice to know i'm not so panicky.
GPS's are bad for that. I only use the GPS on my phone and plan out my routes ahead of time.