The only way this is possible is to have the battery charged in the opposite polarity. Before you say it can't be done, rest assured that it can. ( a lead-acid battery has to be drained to absolutely nothing and then the polarity can be reversed ).
If he has done this, it is a clever trick for attention. BUT..... it carries huge consequences if someone puts a different battery in the car. ( it will let the smoke escape from everything ). Paul
