There is one funny trick for the April Fool's Day, or just for fun at any day.

The trick is directed at neighbors. If you want to ligh at them, try this idea.
There is one necessary condition- they should live in the opposite flats and their doors should open inside. If it is so, then you are lucky and can play this trick.

So, take a rope, and tie up the door handles of both neighbors, but remember that the rope should stretch tightly The only thing is left- you should ring both doors simultaneously and than watch the show! The neighbors will try to open the door and you'll be a witness of a fascinating rope lugging!

Have fun with this funny idea!