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.
(..) I told you Watson, I can't remember. Perhaps you've repressed it. Hmhmhm...Thats where we differ, Unlike you, I repress nothing. Perfectly normal. How dare you be rude to this woman who's invited us into her tent, Offered us a hedgehog. Says the man who throws women from trains. Who are you two? (..)2011 Sherlock Holmes: A Game of Shadows