well as long as he doesn't do it well he drives... that would be unsafe... or... it is his wife on the phone and she wants him to look at something he left in his truck!
Not a good spot to take a call for me as my phone would most probably scare the life out of me and I'd drop it each time. Or better still, I'd have it turned off and let message bank take my calls.
I think the picture needs someone on hands and knees on the floor that he just passed, pointing to the window. :-)