This case study for the EVoc indestructable billboard does the daring thing of grabbing a guitar-riffing bit of music. To show off Evoc's protective backpacks and the shock absorbing effect a classic "strength of hit" measuring device usually found at amusement parks was worked into a backpack billboard. Then everyone took a punch to the backpack to see how strong their hit was.
97 hits per hour
There must have been a line around the block for the chance to hit that billboard. Is that an average by the way? Perhaps people don't sleep at all in Berlin.