One shot of Doc and Addy is flipped when the main crew first meets The Man (after the Spartacus reference). It's easy to see because Doc's "That's What Cheese Head" shirt is backwards.
The Man states that Spartacus and his clones were, in the end, crucified upside down. This is probably not historically true, and the movie Spartacus certainly depict the captives being crucified in the traditional, more common position.