HA! That sounds like 40 love to you. I was never any good at tennis :)
I certainly didn't think of the things you'd add to the mix. Velcro! On the business end.! OK Mr Devious. You win totally. No wonder those subs keep returning. I bet they're all trying to think exactly what you had in store for them and how they can worm their way out of the worst/best of it. Do you give any clues? Did the sub above here see the chair before he was strapped in? Not sure which would be worse, seeing what was in store or experiencing each extra terror as it came along.