Due to my agonizingly boring Japanese class, asking "what time is it?" is not uncommon. Typically our teacher doesn't have enough time to listen in our conversations because she's too busy checking her damn e-mail, but one time she was listening in on a friend of mine. Some random person asked "what time is it?" and he answered "10:45". Our Japanese teacher abruptly got mad and told my friend, in her broken english, "no estimating in my class!". It was hilarious and to this day we are not allowed to estimate in Japanese class. It's often brought up along with all of her other crazy made-up rules, but now we (usually) merely get a scornful glance.