'Javier Novoa''s credit as "Script (supervisor)" is misspelled as "Scrip" in the opening credits.
Upon first encountering "El Tuercas", Pedro tells him he has been just hit on the occipital, while he has actually (and visibly) hit on a cheekbone.
In the restaurant scene, the characters comment on the Mozart music in the background... while actually there's no background music at all.