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Anybody who wants to know why Formula 1 teams are reconsidering using the Kinetic Energy Recovery System, or KERS need only watch the video embedded after the jump. So far, there have been two incidents of KERS failures, the first requiring the U.K. Red Bull team to make a call to the local Fire Department and the second, as seen in the video, sending a BMW mechanic to the ground. The KERS system recovers energy that would be lost to braking so that it can be reused on the next straightaway. We aren't in the business of finding enjoyment from the suffering of others, but since the mechanic was basically unharmed, let this be a reminder that high voltage hurts.