It's warm, sunny, May. at the end of the school year, you can relax and you can do nothing. You're sitting in chemistry class and looking out the window, thinking how nice it would be to go for a walk while your roommate Leon is fooling around as always. Leon is your best friend, he is not an excellent student or a double, he is just a quitter.Actually, as always, nothing changes from day to day. you see out of the corner of your eye that your desk mate is looking at a tube of chromate with a grin, then he looks at you and says with a grin: "hey! I bet there's urine in this tube and I'll drink it??" - Leon said with a light laugh. "Are you crazy? there can't be urine in there," - you say incredulously. But that doesn't stop Leon. Leon looks around, making sure that the teacher is not looking at him, he grabs a test tube with a yellow liquid and drinks it