Not A Good Mix: Energy Drinks and Coffee

For a prompt: Fanfic Prompts Tumblr: "My favorite college experience is when I had a 7am class and the kid next to me literally poured a monster energy drink into his coffee said 'I'm going to die' and drank the whole thing." Shaun's idea of how to feel more energetic after a few days of no sleep backfires and Desmond helps him through it. Pre-slash if you squint.