I experienced a strange phenomenon. Whenever I'm a little drunken, I speak English fluently. If I am not drunken, my english, I think, is not so fluent. I don't know why. Maybe I become bold, or I seem not to care about whether I speak right or not. So, I decided to drink a little bit of a before I gave a presentation. But, one problem is that professor may smell alcohol from me. "What the heck is smell?, Dason! Did you drink?" "No, sir. I carried out a experiment with alcohol just before." "Hmm, then why do you have red face?" "I don't know, but I think it's allergic to alcohol." "Don't do your experiment with alcohol before your presentation." "Yes, sir." Oh, my gosh, what am I gonna do next time? I have to find another excuse.