Locomotive jacks.

Fullsize image: https://diqn32j8nouaz.cloudfront.net...s_fullsize.jpg




Previously:

Formula One jack - GIF and photo
Many people jacking up a building - GIF
Exhaust jack - GIF
Jacking up a vessel - GIF
Felling a tree with a jack - GIF
Jacking up a truck on a lift fail - GIF
Dangerous car jacking with lumber - photo