I sprained my ankle by playing basketball just before an exam once, certainly not as exciting as the gokart story, but still painful. I have never been go karting, is it expensive?
Sprained ankles are one of the most painful things you can have happen to you - I have had lots of ankle trouble too.
Gokarting on a tarmac track is different to an off-road gokart, but both are absolutely brilliant. I don't know about the costs for either - it has never been myself paying. Off-road gokarts however are much harder to come by in a corporate sense.