When preacher is trapped in the oven he has already been standing in deep water for awhile and is totally drenched, yet when he jumps out of the oven he lights up his zippo and throws it at the oven which is leaking gas and *boom*.

As anyone that has owned many zippos will tell you, zippos are not water-proof, they're not even water-resistant, and it takes no time at all for them to get waterlogged. Preach would have been trying all day to light that zippo.