Funny Joke

John, who suffers from chest cancer, was in hospital when a pastor decided to visit. Then all of a sudden john couldn't breath and couldn't talk so the pastor gave john a pen and paper to right his last few words. Somehow he managed to write his last few words before he died. Two days later at the funeral the pastor was telling everyone how good John was and how he died, then he remembered the letter and the pastor took it out of his jacket and read it out loud and it said:" you're standing on my oxygen tube"