My wife broke her foot, and as a result was using the little "service chairs" (power carts) at a local grocery store. This one had an attached, auto-retracting cord on the back. Guess what? Except for the color, it looked just like your pic.
This store wasn;t so bad - the carts were kept inside. I've seen missing ground pins on recharging carts where they're kept in the entryway.... during the rain... with the resulting puddles...
I'm just glad I've never had to do "the paramedic thing" after seeing someone get zapped by one (crossing fingers)
