A game of 'Whac-a-Mole' can tell if you're concussed
 

When Reflexion Interactive's Matt Roda was in high school, he suffered a severe concussion during a hockey game that laid him out for months. At the time, his coach put him back in the game after asking asinine questions like who was president and wh...

https://www.engadget.com/2017/01/07/...ure-concussed/