In the latter part of the movie Richard Harris is about to disarm a bomb on a cruise ship. A former army buddy who set the bombs tells Harris to cut the blue wire. Harris cuts the red wire and then tells the other bomb disposal team members to cut the red wire. If the bomb had gone off when Harris cut the red wire, the others not knowing Harris changed his mind after being told to cut the blue, they too would have cut the red and all the bombs would have gone off, killing everyone aboard.