I had 2 Jehovah's Witnesses come to my door the other day, one of them started going down the normal pre-scripted spiel when I stopped him and asked what church he was from. When he said J/W, I said "Thanks for the offer, but I gave up on playing the lottery, I'd have better chances of being struck by lightning while sitting in my watchtower". He didn't get it at first, but his partner who was with him (who hadn't said a word the entire time) suddenly got a disgusted look on his face, grabbed the guy by the arm and said "it's time to go".
For anyone who doesn't get that, the J/Ws believe that Heaven has only a certain number of vacancies, so even if you play your cards right, you still only have a 20% or so chance of actually getting in to heaven. Also, the J/W monthly newsletter is called "The Watchtower".