Needless to say, one of the first things one learns in college is the importance of knee safety. (Most credible institutions cover it in freshman orientation.) And it’s virtually impossible in the college environment not to gain an appreciation for the basic dangers of bowling on already-damaged legs. (Having taken a bowling class for 4 credits during my senior year, I can attest to this personally—or at least to what a cute tush my teammate Stephanie had.) Therefore, those who do not attend college—such as Andrew Bynum and more than half of Bynum’s citizenry—are highly prone not only to knee injury, but to self-induced worsening of pre-existing knee injury (see artist's depiction above of a Bynum, Montana, resident who did not go to college).
(Photo of Sixers game copyright Comcast; image of Peter Griffin copyright Fox.)