Aut cum scuto aut in scuto
I'm reminded of signs that were once posted in the Interstate median area that read "Do Not Use Ingress as Egress". I can only imagine the reason these don't exist anymore is due to our Government Education system graduating students that can't understand those words.
Backstory. Happened in 2012. http://walterzoomiesworld.blogspot.com/2013/08/my-take-on-recent-flying-death-truck-of.html