While atop El TelefériQo in Quito, I saw this sign. Even if you don’t know Spanish, you can probably tell what this means. Essentially, it says:
4,100 meters altitude – Don’t run or You’ll Die.
But actually it just says: Warning. 4,100 meters altitude. Slow. No Running. As if, if you do fall, you’ll free fall for the full 4,100 meters, right to sea level.