I can vouch for that. I fell through the garage roof, roughly 8' to 9', sideways. Didn't do my head much good but the more concerning part is when I got into my car to fetch a tarpaulin. Popped it into first gear, two of my ribs popped out of their sockets. Had to push them back every time I changed gear or turned a corner. Managed to get to A&E where they lost me in a cubicle for a hour and half. Eventually checked me for concussion and when I asked about my ribs, they said, "What about them"?.Then sent me home.