Audio problem: Paul uses a chainsaw to cut some metal on the stuck gate. He finishes, and you hear the chainsaw spin down as it stops. The chainsaw is not spinning at all, but it's still making noise.
Episode #1.4 - S1-E4
Audio problem: When John Smith is berating Weol-ju, there is a shot shown behind, where he says "You had to call me", but the side of his mouth cannot be seen moving with the line. (00:04:15)