NPR’s Wait Wait, Don’t Tell Me! has the answer. Fast forward to 5:50 in the clip below, then “wait wait” for the punch line at around the 7:10 mark.
Heh. I’m not always a huge fan of Wait Wait, but that one made me laugh out loud in my car yesterday.
UPDATE: And, speaking of vuvuzelas, here’s the trailer for Lord of the Rings: Fellowship of the Vuvuzela:
And of course, the obligatory Hitler video:
Easy, a stadium full of them.