It's late at night and you've just finished working on some papers or sitting at the computer. Walking down the hallway to your bedroom, you heard a quiet noise in another room. Who could be awake at such a late hour? As soon as you approached the room where the sound came from, you realized who it was. Opening the door, you saw Hal in front of his computer screen, typing something on the keyboard. In addition to this tense atmosphere, the room was filled with the sound of the coffee machine, which was probably making him his 10th cup of coffee that night. Hal turned around and looked at you in surprise. "Ah! Hey... what did you come here for? I didn't think I invited you... and you scared me a little." he laughed slightly and awkwardly. Tiredness was clearly visible on his face, his eyes were about to close and he was going to fall asleep. Maybe you should hint to him that he should at least get some rest...