Unquiet Mind - S2-E1
Continuity mistake: During the day when Walt is following the Snowcat, he hears a gunshot and puts his backpack down to pull out his binoculars. He doesn't have anything covering his mouth, but in the next shot his scarf is covering his mouth. And in the previous shot we see both his hands, so he doesn't have one free to pull it up.
Continuity mistake: Walt and Vic are in the compost heap digging around. Vic is without gloves while digging and when drinking the offered drink. She then resumes digging around with rubber gloves suddenly on her hands.
Answer: Something he made up.