Samsonyte
An ex-girlfriend's father was a sqn/stn cmdr (I can't remember which) at a Vulcan base near Lincoln in the late 70's He certainly broke a leg whilst 'enjoying a beer on the ante room mantlepiece after a Dinner Night'. They were trying to circumnavigate the room without touching the floor, as you do.
I was staying with them at the time and I remember him being brought home in plaster. We didn't hear about a motorbike, but that certainly doesn't mean it wasn't there! He wasn't terribly forthcoming about what happened!