yeah, this actually happened

I was in the store once. guy comes up behind me and is clearly not 6 feet away. I gave him a moment. he looked foreign so he probably didn't understand the English on the floor markers. 2 minutes and 19 seconds went by (yeah, I timed it) and he has not moved. okay, how about this...?
I take my mask down, started digging in my nose and motioned my hand to him and said: "hey, here hold that.." he flinched.

"well then back up, man!"