Richard Linklater’s observational chronicle, Boyhood, was 12 years in the making and is 166 minutes long — that’s nearly three hours, in real money — and I wasn’t bored for a single moment. Isn’t that miraculous? Have you ever heard the like? Me, who is generally bored at the drop of a hat? Me, who is generally bored before the hat even hits the ground? But those 166 minutes (still nearly three hours, in real money) just flew by, as can happen, when you are utterly engrossed.