When Rosie exits the saloon, she runs barefoot, then she runs wearing shoes, then she runs barefoot again.
When West lights the fuse in the freezer, it goes out. West indicates it's because of a lack of oxygen in the room. If there were not enough oxygen to keep the fuse burning, there would not be enough oxygen to breathe; nor would there have been enough oxygen for the second match to light and/or stay lighted long enough for the second attempt to light the fuse.
When they find the ruby it is encased in an ice block The only way that could happen is if the ice had melted under the gem allowing it to sink inside then freeze over which would have taken a considerable amount of time much longer than had passed.
It is very hard to believe that a block of ice could be split so easily. Even if the ruby could have suspended in it that way.
When West and Rosie are first locked into the freezer, West lights a candle that had been by the door. As he moves back into the freezer, the candle flame begins to gutter, as if there was a lack of oxygen. But they had just been locked in the freezer for a few moments, too soon for the oxygen to run out.
The San Francisco Museum of Art wasn't founded until 1935.