Were does a Jew park?
It really is a hard joke to make. Try to make up an ending to it.
On the way back from BW3s a couple of weeks ago, somebody asked "Where did you park?" which was misunderstood as "Were does a Jew park?". When this was asked back everyone paused, obviously trying to think of a witty answer, but alas no one could come up with a good answer to "Were does a Jew park?". The ride home was also silent as we were all still trying to think of an answer. Finally we all just gave up, but still it is brought up every once in a while, and still it draws silence as the not-so-obvious answer seems to hang just out of thought's reach.