You're halfway through your statistics homework when you hear a thud against the door to your balcony. You really hope there's nothing you'll need to repair, because you barely have enough to buy food and rent at this rate.

When you approach the door, you see a spatter of blood on the glass. Behind it, a man keeled over and clutching his side, bleeding profusely. Against your better judgement, you open the door. You can already hear the man's ragged breathing.