While the authenticity of this video is questionable at best, it does provoke the wince that only men can truly understand.

Let’s give some props to the bystander on the Rio de Janeiro underground who ran to the man’s aid and freed his crotch from the rubber jaws of the carriage doors.

But the video certainly appears to be little more than a stunt, so it’s difficult to vouch for the authenticity of the scene – or even the appendages involved…