El Mestizo's facial scar is clearly seen as painted on his face in some close-ups; in other scenes, the scar is more detailed.
The characters omit the letter D in participles, which happens sometimes in spoken Spanish, but almost never in a performance.
Don Gregorio appears to be dead, and Salomón checks his heartbeat, finding none. The audience and the characters later discover that Don Gregorio was alive, but how he tricked Salomón is never explained.
El Mestizo's skin is unnaturally green, and he claims to have never been a kid.
When Don Gregorio is apparently dead, he blinks visibly.