Execution by cannon, Shiraz, Iran. 1890s.

Refraction is the change in the direction of a beam occurring at the boundary of the two media through which it passes

Test Pilot George Aird flying an English Electric Lightning F1 ejected from his plane at only about 100 feet in 1962... he survived -

It's not just people who go through rehabilitation

Really cute video with a happy ending.
A dog is being taught to walk again after a spinal cord injury.

Chicago