Emo's Alarm Clock Meal

Listen up, genius. You see, "emo" folks are often stereotyped as being all gloomy and into dark stuff, right? The punchline plays on the phrase "wake up inside," which means to become emotionally or spiritually aware. The joke suggests the emo swallowed the alarm clock to literally "wake up inside" himself, get it? It's a play on words and stereotypes!