When Eva is calling on the pay phone at the club after she sees Butcher, a coin purse alternately appears and disappears being clenched in her teeth.
When Butcher is walking around his hair is combed, parted and neat but in a close-up of his face his hair is very messy.
As Eva reaches her dresser when she returns to her dressing room the radio begins to play by itself, abruptly (it was not on when she left).
When "Butcher" is standing on the giant electrical crane, all the closeups of him show him moving a lot, but when they cut to the long shots, he is just a dark silhouette with no movement whatsoever.
When Benton enters Eva's dressing room, her hand is on her head. Cut to a close-up, and it's now at her side.
The man with the flamethrower is wearing an arc welding helmet, which is unnecessary for the job at hand and completely hilarious on its face.
Such face protection is commonly used with such equipment as an extra layer of safety.
Such face protection is commonly used with such equipment as an extra layer of safety.
When Squeamy is trapped in the elevator, his pistol is heard to discharge a couple of times when he is not shooting.
The Butcher is driving from San Francisco to Los Angeles. Just after the roadblock, a sign indicates that he is 22 miles from Merced. Merced is nowhere near the route from San Francisco to Los Angeles.
Early on, crooked lawyer Paul Lowe finds the map showing where the $600,000 in stolen money is hidden, yet makes no attempt to recover it.
In one scene Lieutenant John Lauder addresses Lieutenant "Dick" Chasen as "Mike."
At one point a character refers to Butcher Benton as a "monster-made man," which seems the wrong way around.
On two separate occasions only minutes apart, Butcher Benton is shot multiple times from point-blank range, specifically a distance of only a few feet. During both shootings he is wearing the same light-colored jacket, but no bullet holes or powder residue is ever seen on the jacket.
When Benton steals Carney's car, he simply shifts into Drive and goes off. The engine hadn't been running, nor does he put the key in the ignition and start it.
Eva Martin is supposed to be a stripper, but when the detective interviews her when she has just gotten off the stage, she is fully clothed.