 He would then research the subject, write, draw, and color the comics by using a Macintosh computer.This process gained him criticism in May 1994 when he explained how to do an experiment separating hydrogen and oxygen from water, through electrolysis using a single jar, and a nine-volt battery, for which he defended the comic strip, by explaining the small amount of gas that would be produced in this way would not be overly dangerous.This was reported to be the first time an experiment's safety was questioned.