What is so amazing about the A6 V1.0 paper airplane gun by YouTube user Papierfliegerei is that it doesn't just fire pre-loaded paper airplanes. As you can see from the bottom screenshot, it folds flat pieces of paper into airplanes, then fires them at a rate of about 1 airplane for every 1.5 seconds. It's an engineering marvel that will allow him to win any middle school classroom paper airplane battle.
-via Popular Science
but the noise reminds me of 80s era Radio Shack R/C cars as well