100g is nothing.
I've been ko'd several times. Falling on my head while climbing in a door frame upside down aged 8 or 9, launching myself off a front braking bike down some concrete steps aged 10 or 11, running head first into a lower than expected concrete bridge aged 19. At least twice in fights I lost. Maybe one time in a car crash (there's a little bit of missing time, not sure if I was out or just in shock). I can't count the number of times I've been staggered and seen stars but not lost consciousness.

It probably explains everything.
( brb Monkhouse Stampede, Sat 8 Jun 2024, 16:43, archived)

Oh my word. Concussion?
Did you go to hospital?
(Bou.. Fuck thee in an offly direction, Sat 8 Jun 2024, 16:47, archived)

For some of them, yeah.
Unfortunately the symptoms include shame and bravado. If I knew then what I know now I'd have marched myself straight to casualty rather than to the bar.
( brb Monkhouse Stampede, Sat 8 Jun 2024, 16:56, archived)

I don't think I've ever been knocked out,
Just been dizzy from a fall and nearly fainted. The most outlandish thing thats happened to me is that I went psychotic in a psych ward. Totally lost my mind. It was freakishly terrifying and liberating at the same time. I think your diagnosis of me was quite close. How did you know? Are you a psychiatrist?
(Bou.. Fuck thee in an offly direction, Sat 8 Jun 2024, 17:04, archived)

If you're dizzy or see spots/stars after an impact, that's probably a concussion.
I am a fully qualified armchair psychiatrist.
( brb Monkhouse Stampede, Sat 8 Jun 2024, 18:42, archived)