John Cale has demonstrate another very good law, Ohm's Law. It shows through when he is running through the tunnels he finds a conductor for the bomb. Ohm's Law states states that the current through a conductor between two points is directly proportional. So that being said the conductor for the bomb has many wires going everywhere across the door that are connected to the charges. The locks on the door are also an example of Ohm's Law it is all electrical so there for there is conductors for it behind it. Another example of Ohm's Law is the computers that the guy hacks the White House with are all hooked up to a conductor.