Half a croissant, on a plate, with a sign in front of it saying '50c'
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the sound of 3 hands clapping

An extra hand
 
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By grafting a forearm and hand onto the middle of your chest you could swing it back and forth and clap it with your other two hands, this way you could clap twice as fast and use less energy.
randolf, Dec 09 2003

third arm http://www.halfbake...om/idea/Third_20arm
related idea by [neelandan] [krelnik, Oct 04 2004]

Third hand http://www.halfbake...m/idea/Third_20hand
related idea by [roby] [krelnik, Oct 04 2004]

[link]






       But it'd cost a fortune in new shirts.
oneoffdave, Dec 09 2003
  

       suitor: (to date) Hey do you want to come inside? I'll show you my 3rd arm.
date: (gasps in horror) Why you dirty man! (slaps suitor across face and marches off down path) suitor: No, wait!
silverstormer, Dec 09 2003
  

       Would both sides of the 3rd hand be a palm?... who wants to clap with the back of their hand?
luecke, Dec 09 2003
  

       How about a rubber paddle (or anything that will make a resounding SLAP! when hit against skin) attached to each hand by a spring-loaded band around the wrist (so one would lie under each hand if you rested them palms down on a table top).Now just flap your hands up and down excitedly and you get a double dose of applause (clap just sounds wrong here).
squeak, Dec 09 2003
  

       Just position one hand about 12-inches away from you chest, then use your other hand to go between chest and hand.
Letsbuildafort, Dec 09 2003
  

       Now when I make a typing mistake I can smack myself in the forehead while simultaneously correcting the mistake with two hands still on the keyboard. What a time saver.
half, Dec 09 2003
  

       // Now when I make a typing mistake I can smack myself in the forehead while simultaneously correcting the mistake with two hands still on the keyboard. What a time saver. //   

       Alternatively, a seat with a large hole in the middle would allow you to kick yourself in the backside without even standing up or taking your hands off the keys.
kropotkin, Dec 09 2003
  

       The sound of three hands clapping, one alone.
half, Dec 09 2003
  

       "three of a perfect pair". Give it an upper arm, muscles, and some gnarly tatoos and I'd buy it like a shot. Had I any money, of course.
Paradiddlellogram, Nov 17 2005
  
      
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