This week, Meredith tells us that we'll be exploring the concept of growing up, becoming an adult, and zzzz. Seriously, how old is Meredith supposed to be on this show? 30? We'd say Ellen Pompeo's skin puts her at about, oh, 57, but nobody asked us, so ... Anyway, a school-bus crash fills the ER with a gaggle of high-school kids who proceed to teach the doctors important lessons about their own maturity. Clever!