I have concussion. It is surprisingly undetectable! I carried on working and generally getting on with things until the headache got worse and the disturbed vision made my friends think I should get it checked out. I hadn't put 2 and 2 together with the fall I had when I hit my head. Dur.
Anyway I made this layout for Sue's sketch challenge while I have been concussed, will leave it up to you to see if you can tell lol.