Many cultures consider horseshoes to be a good luck charm and their placement and shape are very important. A horseshoe is hung on a door with the ends pointing up as to have them pointing down brings bad luck. The idea behind this is that the good fortune will spill out if it is facing down. Some people also believe that you must find a horseshoe that has been lost by a horse for it to be lucky. A few traditions dictate that any luck – either good or bad– will only affect the owner/finder of the horseshoe and not simply the person who hangs it up. Some people believe that guests must enter and leave a house under the same door with the horseshoe hung over it in order to take the luck with them.