> So what happens if I train myself to slowly move my hand towards the button and only stop when seeing the light? Mu[1]. There is no such a device, so there i

> So what happens if I train myself to slowly move my hand towards the button and only stop when seeing the light? Mu[1]. There is no such a device, so there is no way to train against its intended purpose. [1] https://en.wiktionary.org/wiki/mu#Interjection https://en.wiktionary.org/wiki/mu#Interjection