I've been using the bus rather than the car recently: the positive is that it gives time to observe and quickly record wht I see in a few scribbles: the negative is that sometimes one hears what one would prefer not to hear: as I scribbled the image of the old man sat in front of me. two students opposite in whose direction he was looking were sharing experiences of being drunk at a party: one was describing graphically to the other how his mate was so drunk that he drank his own vomit. I couldn't work out whether the old man's expression was disgust or whether he was deaf!