https://www.cnet.com/news/this-hack-let-someone-fire-a-gun-by-raising-his-eyebrow/

One Saturday in late June, Michael Phillips fired a hadgun. He used an eyebrow to pull the trigger. 

The feat of marksmanship came thanks to a hack that brought together a Glock 17, a sensor and a specially rigged mount, Motherboard reported Thursday. The hack helped Phillips, 37, overcome spinal muscular atrophy, a severe condition that he's lived with since birth, and accomplish a goal he'd set for himself.