Sometimes your subconscious will serve up a dream featuring an egregious lack of subtlety. Not content with that, it will also add in elements so mockingly rude that it will be a blessing when this dream is truncated by the alarm going off. Which, of course, leaves you starting the day feeling lonely, depressed, and annoyed.
Additionally frustrated by the fact that your lucidity and control — usually present in dreams — was quite noticeably stripped from you on this particular occasion, you will want to punch your subconscious in the head.
Which would mean it would doubly win, since you’d be punching your own head, and maybe that’s just the kind of wakeup call it figured you needed anyway.