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.
(..) Yeah. Well... You need to get into this. Is there a dressing room I can use? No. Where's my co-star? Be rude not to give her a kiss beforehand. Outside in the truck. Full of joie de vivre, isn't he? You also need to wear this... on your head. (..)2011 TvShow: Black Mirror Title: The National Anthem Season: 1 Episode 1