Morning Scepticism: Pascal's Wager

If you do believe and God is real then you go to heaven, and if God isn't real then you get the same as if you believed and God wasn't real. But if God is real and you don't believe, you get hell. It seems fairly reasonable on the face of it, but I wonder how many people would really apply such reasoning in everyday life? Would they, for instance, hand over their wallet to a mugger who claimed to have a gun pointed at their head even if both hands were empty. After all, the consequence for not believing if there really is a gun is paying the ultimate price. The gun might be invisible after all, you can't prove that it's not really there...