I walked under a ladder and nothing happened. I opened an umbrella inside the house and nothing happened. A black cat crossed my path and nothing happened. It's possible for a four leaf clover to turn out to be poison ivy. It's possible for a horseshoe to fall off the wall and strike you in the head. There is no reliable superstition for good luck, except for the application of good judgment.
And as I'm lost in thought while noticing how good luck and good fortune could easily turn into bad luck without warning, here are some photos of Vanessa Hudgens.