Oh Gillian - please don't do that - you're scaring me!!!! Pull over and write it down, then drive again...
I've been thinking about writing things in the middle of the night - it actually works for me. The writing is awful though, and since I can't see what I'm writing I tend to forget where I was in the word and writing things like 'writinging' and 'contemplive'. And the writing doesn't follow the lines and is messy and big. But it's decipherable...
I actually get some of my best inspiration at night or early in the morning.
Deb