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.
(..) Westerners walking in and out of this place all day long. But if you want to avoid... That's so rude. Can't believe he just did that to me. Chief, if you want to avoid an international incident, you give me my guys (..)2016 13 Hours