Half a croissant, on a plate, with a sign in front of it saying '50c'
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Car Horn Flame Thrower

just for fun
  (+6, -1)
(+6, -1)
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And for emphasis, when people won't get out of your way.
JesusHChrist, Jul 10 2013

Hydraulophone http://en.wikipedia.../wiki/Hydraulophone
[JesusHChrist, Jul 11 2013]

[link]






       Modern car horns are typically mounted under the hood or in the left fender; not places where you'd traditionally want to deploy pressurized napalm.
Alterother, Jul 11 2013
  

       This could be like a wind instrument but using napalm instead of air. Or the flame and the sound could just coincide, like a very large can of wd40 mounted on the hood of a car, with an amiable nozzle and some king of igniting mechanism. The horn, the spray of the wd40 and the lighting mechanism would be synchronized so that when you toot tooted on your horn there would be a corresponding blurt-woosh blurt-woosh of flame in the direction that the nozzle was pointed.
JesusHChrist, Jul 11 2013
  

       If the napalm actually made the sound maybe it could be based on the principle of Steve Mann's Hydraulophone, the (linked) instrument that uses fluid vibration to produce a sound (which I by the way have played but still don't understand the principle of.)
JesusHChrist, Jul 11 2013
  

       I know you're not one to toot your own horn... now I know why. Utterly practical says I, and oh-so-bunworthy! [+]
Grogster, Jul 11 2013
  

       How did I miss this? I want one that shoots from the front and one that shoots from the back of my car! [+] (to keep tailgaters back!)
xandram, Jul 12 2013
  

       I got this idea while waiting impatiently behind other subway customers on the escalator out of the subway, anxious to smoke a cigarette and nervously flicking my lighter. #selfincrimination.
JesusHChrist, Jul 12 2013
  

       Air horn driven by LPG ... butane or propane. Spark igniter in the throat of the horn.   

       Simples. [+]   

       <wistful pondering>   

       Hmmm, church organ operated by flammable gas ... ?   

       </wp>   

       <later>   

       Ach, it's been done ...
8th of 7, Jul 16 2013
  

       Good Heavens, [8th], you're back! I thought it would take more fluffy-kittens-in-a-blender type ideas to bring you out of hiding... <GROG wanders off, inexplicably disappointed>
Grogster, Jul 17 2013
  

       Information:   

       This idea is now Baked.   

       A regular car air horn, supplied with pressurised gas from a disposable butane cylinder via a modified blowlamp chassis, provides an acceptably loud, clear and pure-ish tone, and a spectacular burst of flame when an ignition source is presented to the bell.   

       For durability, a metal horn is greatly preferable as the plastic ones tend to distort and char after a few uses.   

       For personal comfort, a remote operating trigger is essential as it is surprisingly easy (and rapid) to lose superficial body hair from the arm (sorce of ignition: basic cigarette lighter) and the face (eyebrows gone (again)). Further, the distinctive odour invites comment from cow-orkers.
8th of 7, Jul 18 2013
  
      
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