A man goes to the track and sees a Priest blessing a horse before
  a race and quickly goes to the ticket window and bets.  The horse
  wins.  He watches the Priest carefully for the next four races, and
  continues to win, until he has quite a small fortune. He decides to
  bet it all on one last race.
    Before the horse crosses the finish line however, it drops dead.
  The man rushes up to the Priest, confronts him with what he's seen
  and demands an explanation.
    The Priest just shakes his head sadly and sez, "That's one of the
  problems with you Protestants.  You don't know the difference between
  a blessing and the last rites."