Indeed. But you aren't playing anything while riding a bike, unless you are into much more dangerous stuff than I imagine you to be, even mountain biking, you enjoy scenery or get exercise. Nor when watching basketball are you actively involved in the sport other than screaming at the guy with the ball (Make it! Miss it! Air ball!) So the way to get Quidditch involved would be you actually playing soccar (Make the goal for Hogwarts, Gadget!) but no brooms, sorry! [You realize, of course, that with my weird logic, I am never going to admit to a guess... ]Spoc... um, Pen out. Long may you live and prosper.