Superstitions - Level 2

I am not superstitious, are you? Yesterday was Friday the thirteenth. Some people think that Friday the thirteenth is an unlucky day. I think that it is just like any other day. 
Some people believe that if a black cat crosses your path, you will have bad luck. 
I don't believe that either. My mother always gets upset if I open an umbrella in the house. She says that it is bad luck. She is probably right about that one because an open umbrella would take up a lot of space, and you might knock things over. 
If your left hand is itchy, you are supposed to get money. 
I have had an itchy left hand before, but I haven't received any money because of it. It is bad luck to walk under a ladder. This is probably [bad word] because you might knock somebody off the ladder, or have a can of paint fall on top of you. 
If you are acting in a play, it is bad luck if someone says "good luck" to you. This is very confusing. 
You are supposed to tell an actor to "break a leg." 
It doesn't mean that you want the actor to break his leg. 
It means good luck to the actor. 
Actors have a lot of superstitions that are very unusual. 
I am not superstitious. I don't believe in superstitions at all. It is just fun to learn about superstitions. 
Some of them are very old and have been passed down from generation to generation. I once did a project at school on superstitions. It was a very interesting topic, and I got a good mark for it.