Instead of going through all the rigmorol of getting some wire, attaching it to the car battery, finding a pencil, biting the rubber off one end, attaching the wire to either end of the pencil blah blah blah...why not just sit in the passenger seat of your car, wind it back, laydown, crack one out and wait for the sun to rise - much better idea than potentially blowing your arms off, imagine what your mum would say - "How did it happen officer?" "well we think he was attempting some new sexual practice; similar to exphixiwanking, using a pencil and a car battery, basically your son was sick and now he's dead!" "Oh no, don't you think it was possible he was trying to make a light using the pencil and the battery?" "Don't be so bloody stupid!! who would ever think of that!!"