I made the mistake of turing around once when my daughter said, "Mommy, look at this," and now that's the only phrase I hear. In the car. At the park. While trying to make dinner.
Yesterday it was while I was on the floor of her brother's room trying to lower the crib mattress by myself and holding the mattresss part up by my feet.
Often my reply is "I'm driving the car and I cannot turn around right now." This has very little effect on a 4-year-old. I am inevitably doing something like carrying a pot of boiling water or unloading knives from the dishwasher when she suddenly discovers the BEST TWIRLY SKIRT EVER that I simply MUST LOOK AT RIGHT NOW!
She is wonderful and cute--but she drives me nuts.