If you think this job is going to be easy, you're in for a 'rude shock'. [=you will be unpleasantly shocked when you find out that this job is not easy at all]
He's about to have a 'rude awakening'. [=he's about to find out something that will shock him unpleasantly]
I was 'rudely' [=suddenly and unpleasantly] awakened from my nap.
(..) But following me is predatory, isn't it? Could l ssk you to move? l'm sorry but l... l'm sorry. Of course. - lt's just when you move. - lt wss too rude of me. - l can't really bear the pressure... - Are you all right? l wss dreaming. Awful. Hana. Hana, are you all right? (..)1996 The English Patient