Two fish swim into a concrete wall.
One turns to the other and says, "Dam!"
How can you drop a raw egg onto a concrete floor without cracking it?Yes, we can hear the groans from here, but it isn't easy finding jokes with the word "concrete" in them. And "concrete driveways"? Forget it!
Easy! Concrete floors are very hard to crack.
If you know any better ones though, why not add them below?