There are times when it's appropriate to take a break from serious and intelligent. In fact, I'd recommend "sandwiching" a little craziness into one's day. Might be healthy.
Quick, everyone, FROWN! Sharon just walked in and she might see us enjoying ourselves. Pretend to be emo teens until she leaves! Sullen, people! Morbid if you have to! Heck, go for downright morose!