The French rules aren't clear on this one. I don't know what he's called in English/German, but in French he's "Hector le porc" and he's the bad card that makes people draw up.
What happens if I play one such card and the next player can't play anything? We've been playing that he draws the number of cards indicated by the last one place on the discard pile. (Otherwise you just say "Can't play anything!" and draw one card...)