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.
(..) Everything's fine. All right, let's start that bar fight. Cheat! John, what do you say? Hit me. Now, that's just rude! Hey, Sheriff! Come on! What's his problem? Nothing. He got shot up today, so we're taking the opportunity... ...to replace the visual cortex. (..)1973 Westworld