What started as the worst thing to wake up to at 3AM became the funniest, most delirious thing. My girlfriend and I were muffling our laughter every time they got to measure 4 just so they would keep going.
About the third time we heard those B naturals we were gasping for breath. It's interesting because there are plenty of ways to mis-hear this (the bass line going to B flat under the guitar's C can make you remember the guitar part incorrectly, for example--I never noticed that until today). But a B natural instead of flat? Wow. And yes. Those are argyle socks.