I had a QSR shop today.  The line was long and slow.  That worked in my favor since I had to make multiple timings.
After I boxed up my leftovers and was on my way out, Dude sitting down with his family asked if I was doing an evaluation.  Huh?  His wife, who was behind me in line, said I saw your timings.  Busted.  They worked for a hardware store that is frequently shopped and they knew the triggers.
Then Dude at the next table joined in and said he was a mystery shopper for a nationwide pizza chain.
That all made for an interesting conversation!
"I told myself to quit you; but I don't listen to drunks." -Chris Stapleton