I recall at my first job one of our computer rooms had the emergency stop button on the wall - just at head Hight.
One time I or My Boss (I cant recall who) stepped backwards and hit the off button with his head - we had our electrician fit a molly guard after that.
Several jobs ago, we had a datacenter where the PDUs for the racks were mounted at the very top. Normally, this wasn't an issue as this was well above head height...
One day we hired an engineer who was a Sikh. Turns out the PDUs were almost exactly at turban (dastar) height. Cue the outage alerts (and the installation of mollyguards).
that's what differentiate a good engineer from not-so-good - they learn on own mistakes!