To use the kind of arbitrary pop culture reference Seth MacFarlane loves, hosting the Oscars is sort of like the opening sequence of "Raiders of the Lost Ark." It's your job to get that giant boulder rolling, and then you just have to get the hell out of the way. During Sunday's 85th annual Academy Awards ceremony, MacFarlane had an especially huge rock to push, one that ultimately took more than 3 1/2 hours to come to rest. And while it took him a long time to get the ball rolling with his opening production number, he finally did so in spectacular fashion. After that, it was all he could do to deliver one-liners lively and witty enough not to slow the already lengthy proceedings down any further, or bring them to a crashing halt. To be fair, any Oscar host faces two seemingly irreconcilable demands. He or she has to play...