I was really comparing our speedway rules with Poland who don't seem to give a sh** really. To be honest if you watch the 6 nations with some of the slow motion shots 21 days is definitely the minimum.
If it swelled up more or less straight away and in quite a bit of pain, bet it's ligaments, had exactly the same at moto cross a long time ago, did take a long time to sort of mend so obviously hope it's not that for Vinnie.
I'm sure you had no issues after, but surely our rules are correct really just to be safe, you see so many sports people from all sports suffer long term with concussion.