In London one porta potty that when you go inside you can see the people outside but they cant see you https://www.youtube.com/watch?v=t0_gW7fK26w&list=UUXhSCMRRPyxSoyLSPFxK7VA

^
Got this from this video by Matthew Santorro on You tube

If you feel dumb

Just remember sloths sometimes grab there own arms thinking there branches and fall to there doom.