OK, so the apple doesn’t exactly get crushed, but that’s not the awesome part.
These are neodymium magnets being brought into contact by magnet sellers First4Magnets. They are the strongest kind of permanent magnets that you can buy commercially, and you can see that strength proved in the full video below:
But the really astounding part is how strong the magnetic fields are. Look at how part of the magnets break off during the seemingly instantaneous apple smash. Instead of all the pieces flying off into the air, some are pulled out of the air to stick on the magnets’ surfaces. Inverse cube law FTW!