Dwarfs give bad luck!!

My friends say that dwarfs give bad luck. I think that is because everytime we see a dwarf something bad happens.
One day we watched Family Guy and the cartoons said that dwarfs give bad luck.I'm not very superstitious but the other day, when were in a concert, we saw a dwarf there and the lights went off. Since that day my friends have become very superstitious with dwarfs but I don't believe in it.
My opinion is that dwarfs give bad luck as long as my friends are near me because the other day my friend Juan Carlos saw a dwarf and later, when he was in a café with me, his coffee cup fell from his hands. Its not a joke.
In conclusion I'd say that you should be carefull with dawrfs because we never know what can happen.