not all dreams will tell you premonitions, but it gives you clues to what might happen in the next few days. may not happen exactly as you might think like in the dream. yeah dreams that tell premonitions are quite shocking after you realized that you just had a dream similar to it.
here's one i had some time ago. i dream that i was riding a bike, just outside of our house and by the streets. my cousing and i was riding around the street and suddenly a cop just pulled over and told my cousin why is he riding a bike without a helmet. he begins to write him a ticket. i was faraway trying to hide from the cop. the dream pretty much ended there. the very next day..i went riding the bike outside just about the same time that was in the dream. there were other children riding bikes. of course a cop came right then. he pulled over and said something to the little children. i couldn't tell, but i'm sure he was warning them to wear helmets because they weren't wearing any helmets. me...i hid behind a car until the cop pass by.