Well, that kid at my school also happened to be 6'9" and was coerced into playing basketball. One day after practice we were walking back into the locker room when all of a sudden I opened my eyes and found myself laying on the locker room floor surrounded by a ton of naked dudes and my whole body was aching from head to toe. I had no idea what was going on. Turns out the weirdo had read a guide on the sleeper hold and snuck up behind me to do it. Worked like a charm..  I passed out and convulsed on the ground for ~30-40 seconds, hence the gathering of the crowd.