My brother claims that Sam's pentagram tattoo is upside down when Dean and Sam show Henrickson their tattoos. Does anyone know? I tried looking for pictures online but they are difficult to make out. I don't have the episode handy to watch, so I can't check that way either.
It would be interesting if this is the case, considering the upside down pentagram is said to represent Satan. Considering Sam's recent activities, that would be a pretty good foreshadowing on the part of the writers.