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'm not stubborn. I'm just truthful. I know. A lesser man would have told me it was one long holiday, and I would have awakened to a rude disillusionment. Well, now, wait a minute. If you want to get vicious on this thing, I'd be happy to accommodate you. No, I don't (..)1954 Rear Window
(..) of anointed people. I made a simple statement, a true statement, but I can back it up if you'll just shut up for a minute. If your opinion is as rude as your manner, I don't think I care to hear it. Come on now. Simmer down. You-- (..)1954 Rear Window