In Blues Brothers 2000, during Elwood’s motivational speech to the band after running out of petrol names several musicans. At the end of the list is Robert K Weiss. The band are turn each other and say “Who’s Robert K Weiss?”, “On idea”. It’s a bit of a question as to how this is. However, a search on Google found that Robert K Weiss is in fact the producer of Blues Brothers (the original) and Blues Brothers 2000. Apparently it’s an in joke.
My guess had been that is was the guy who asked “Who’s Robert K Weiss?” Looks like I was wrong