If you own a mirror, take good care of it. If you break it, you'll have seven years of bad luck. If someone asks for the salt, be careful not to drop it. If you see a ladder in the street, don't walk under ladder. Walk around it. If a car hits you on the road, it is probably because it's the thirteenth day of the month, and most likely a Friday.
These are all superstitions, and mostly silly. Many superstitions started a very long time ago but people still believe them today. Some of them are easy to understand. For example, if you walk under a ladder, the person working at the top of the ladder could drop something on you.
But most are not so easy to understand. If it's raining, take an umbrella but don't open it inside the house! And if you see a black cat, keep your fingers crossed that nothing bad happens! Why?
