Haha, first thing that pops into my mind! "Wij van WC-eend..." That's all you have to say in the Netherlands to label this behavior :) [0] (Today this would qualify as a meme).
I didn't remember the super German accent, probably has to with the public image of a scientist looking like Einstein :) (btw the commercial is from 1989 and in 2007 it won best slogan ever with 46% of votes [1]!)