Dead Freight - S5-E5
Continuity mistake: A little boy finds a tarantula at the start of the episode and picks it up, letting it crawl over his hands. In the overhead shot of his hands, it shows him letting it crawl up his left wrist and start to get on his sleeve. But in the next shot from in front, suddenly the spider is in the middle of both his hands crawling over them.
Chosen answer: It is part of the ritual for la Santa Muerte. It is a sign of humility and sacrifice.
djm