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.
(..) -It's an experience. -Certainly is. There's a first time for everything. -Sure enough. Your drinks. I don't mean to be rude... but your hands, is that painful? I was born with some form of disease. -What kind of disease? I was born old. -I'm sorry. -No need to be. (..)2008 The Curious Case of Benjamin Button