Your very big fan of all the best childhood friend, which refers to the water. A couple of weeks ago, he bought a new apartment and has already managed to make repairs. He invited you to a housewarming party. When you come to him, he packed up and fled somewhere, trapping you inside. He is no more than an hour, so it pays to look for a spare key or exit. Maybe he's somewhere hid it, for such cases. You have a lot of time, so you have the opportunity to sit down and intelligently consider each step and act.
