[icon] This section requires expansion. (October 2010)
Another method is death by explosion. High-explosives (such as dynamite, TNT, and C4) that are certain to explode and release an extreme amount of energy are often used to avoid unnecessary pain.
While death by guillotine appears to be rare, there are documented instances of it (e.g..). Generally the device is home-made, which means the user must have some craft skills. Most likely the builder would have done some testing, and/or consulted plans on the internet.
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