The Vanishing Shadow Part4 Trapped

At the Tribune, Gloria Grant arranges a deal for her boss Mr. MacDonald (William Desmond) to pool his shares with Stanley Stanfield's. Meanwhile, Professor Van Dorn (James Durkin) offers to lock Stanfield's Tribune stocks in his special burglar-proof (and Bomb-proof!) vault--which would have been fine if Dorgan and his men hadn't attacked Van Dorn's laboratory. Now Stanfield is trapped in the vault and Van Dorn's defensive chemical vapor is eliminating all the oxygen inside it! (1934 - Universal Pictures)