think good thoughts
2 good friends died in car accident and went to heaven. They were 2 good men so God gave them 2 pairs of angel wings so that they can fly around just like others. Before take off, God told them “Do not think of something nasty, if you do, you wings will break off!”.
The 2 friends happily went off to tour heaven. On their way, there was a group of beautiful angels flying near by, one of the friend stared so hard and suddenly his wings broke off. As that guy sadly bent over and picked up his wings, the other friend looked from above, and suddenly his wings broke off too.