I'd be used to it in all honesty. I'm used to taking classes with a grade or two up. Depends on the subject too. If it's one I like I'd be cool, but if I got chucked into, say calculus, 2 years early; I'd lose my mind and go completely neurotic and read nothing but textbook that whole school year.
Someone buys you a skateboard with a rather... Suggestive design. What do ye do?