Trick Effect & Routine:
Effect :
A magician explains he recently purchased a invisible dart board and wants to try it out. He borrows a bill and tightly rolls it up .He turns sideways and throws it at the wall(the dart board).The bill disappears in mid-air. Then the magician shows his hands to be empty and walks over to the wall and magically appears again once pulled out.

Secret:
When your ready to throw hold the rolled bill like dart and explain that it will disappear in mid-air (to add to the effect). Next make sure the hand you throwing with is on the opposite side of the audience. Bring your hand back behind your head and pretend to throw it but don't let go. Say "one" Repeat the procedure and say "two" This time do the same but when you bring your hand back wedge in your ear like a pencil and pretend to throw ,yelling "3!!!" And it will appear as it vanished. Show your hands empty. And give a puzzled look like you cant find it. Even scratch your head and when you do secretly palm the bill into your hand and walk over to the wall and pretend to yank it out of the board and pass the bill around for inspection