Construction began in September 1938. From the time the deck was built, it began to move vertically in windy conditions, so construction workers nicknamed the bridge "Galloping Gertie". The motion continued after the bridge opened to the public, despite several damping measures. The bridge's main span finally collapsed in 40-mile-per-hour (64 km/h) winds on the morning of November 7, 1940, as the deck oscillated in an alternating twisting motion that gradually increased in amplitude until the deck tore apart. The violent swaying and eventual collapse resulted in the death of a cocker spaniel named "Tubby", as well as inflicting injuries on people fleeing the disintegrating bridge or attempting to rescue the stranded dog.
Gif converted by Satcom Guru.
The video showing people calmly walking away as the bridge is wobbling is fucking wild. Check 0:56.
I'm sure they were locals, and this was just another day. It had been swaying for months without any issue, why would today be any different?
What's really wild is that, in 1940 when cameras were still limited, they happened to be filming - from multiple angles - at the exact moment it collapsed.
Also, the guy walking on it at 1:10. Wonder if it's the same guy as in the gif?