House of Horrors

Rondo Hatton is the original Monster Without Makeup. He suffered from acromegaly; the disease caused disfigurement to his face, spine, hands, and feet. Doctors believed what set off this glandular disease in Hatton was exposure to poison gas in World War I.

Rondo Hatton's acromegaly was not caused by exposure to poison gas. The disfigurement he experienced was due to the disease itself, which developed after World War I, and the misconception about its cause was perpetuated by film studio publicity. Perhaps at the time they believed it was true - but there is no medically accepted validity to poison gas as causative..

After the Creeper kills De Lange and smashes the bust, Joan runs to the studio door and finds it locked. It would have been much more sensible for her to have tried fleeing the studio while De Lange and the Creeper were fighting.

People don't always act "much more sensible" when they are under duress.