the road has emptied out now ; there is only me and the semitrucks , and i feel like my brain is processing information at eleven thousand times its usual pace , and it occurs to me that what i 'm doing is very easy , that driving on the interstate is the easiest and most pleasant thing in the world : all i have to do is stay in between the lines and make sure that no one is too close to me and i am not too close to anyone and keep leaving .