Visible crew/equipment: When Angel Eyes sits down at the dinner table in his first scene, there is a small unlit lantern hanging on the wall near his head, and unexplainable light sources reflected on it. (00:09:35)
Directed by: Sergio Leone
Starring: Clint Eastwood, Eli Wallach, Lee Van Cleef
Visible crew/equipment: When Angel Eyes sits down at the dinner table in his first scene, there is a small unlit lantern hanging on the wall near his head, and unexplainable light sources reflected on it. (00:09:35)

Continuity mistake: When Blondie abandons Tuco in the desert, watch the rope around Tuco's neck. It changes between shots, sometimes over his left shoulder, and sometimes hanging down in front of him. It is not due to the camera angle. (00:28:27)
Tuco: I'll kill you.
Man With No Name: If you do that... You'll always be poor... Just like the greasy rat you are.
Trivia: Eli Wallach actually did get a black eye during his torture scene (but thankfully nothing more).
Chosen answer: Tuco knew he had a better chance at survival (and the gold) by playing along with Blondie and keeping his balance on the cross, hoping Blondie does not miss the rope when he shoots. This final, deadly game was preferable to being shot outright by Blondie and dying a poor man.
Scott215
Tuco had no idea that Blondie's intention was to shoot the rope and let him live.