Mystery shoppers also carry stopwatches to time exactly how many seconds it takes to be greeted and served, all while memorizing more words and figures than an astrophysicist. Well, a crappy astrophysicist, anyway.

iStock/Antonio_Diaz
"No, I'm not timing you with my phone. I'm looking at, uh, p-porn. Yeah."

"I once shopped a tapas-type place, and I needed to order six tapas at two different times," Amanda explains. "I also needed to order a glass of wine, but have them recommend me one. I had to know the exact name of the wine, which was some fancy French name that I could barely remember, and I had to know the exact time I ordered the tapas and the exact time they came out. I also had to know the exact times the waiter/waitress came over, the exact words she said each time, and keep track of any specials she offered us."

bule/Pixabay
"And the exact amount of spit she hacked into my food."

Hey, if getting paid to drink were fun, they wouldn't call it a job. They would call it a university scholarship.

"I just finished an assignment that required me to observe if I had been carded for a mixed drink," Betty recalls. "I hadn't been carded. When this happens, it's always a weird moment for me, because deep down, I know that the employee is most likely to be let go ... On this visit, the manager lacked tact and fired the employee on the spot in front of me."

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"The customer told me all about it! That one right there. Next to those steak knives."

Imagine that you're a psychotic asshole, and someone snitches to your boss and costs you your job. How likely is it, on a scale from "berating the barista" to "voting for Trump," that you, a psychotic asshole, won't handle it well? In Betty's case, it was very likely: "When I left the restaurant, I had an angry employee who was wielding a baseball bat waiting for me in the parking lot. The employee then started to swing the bat while yelling obscenities. I calmly removed myself from the situation by going back into the restaurant and asking someone to call the police ... This was the last time I did that type of assignment for that company."

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"Can I opt out of the 'seafood' and 'possible homicide' categories?"

And that's why you need the secret identity, Tony Stark.

They're not all assholes, though. Sometimes, mystery shoppers have to report people for being decent. Irving explains: "There was a cashier at the Disney Land ticket office who said, 'I shouldn't tell you, but Park Hopper tickets are really not worth it.' That was good advice, but the 'script' they're supposed to follow explicitly wanted them to try to upsell to that option. I had to report her. I imagine the Disney people were less than happy that a cashier was saving customers money at their expense. I cannot say for certain, but she probably got in trouble because of me."

Disney Parks
"The court of Disney sentences you to 15 rides on It's A Small World."
"Nooooooo!"

And if that makes you feel gross inside, don't worry. There's more disgusting outside stuff to focus on. "I used to think all I needed in a hotel were clean linens and no bugs," Betty told us. "But I've seen too much ... I now know that bedspreads and duvets are washed and changed three or four times a year, tops. There is a hotel I stayed at recently that advertised cleaning the bedspread after each guest, but when I smelled it, it definitely did not smell fresh. You should also check the crease in the mattress for bugs or signs of bugs. They like to hide in the edge of the mattress border/decoration ... Finally, don't drink from real glasses. A lot of hotels don't wash them out between guests."

Being a mystery shopper is like putting on those glasses from They Live, only instead of seeing subconscious propaganda, you bear witness to a secret world of skid marks and bedbugs.

Jiri Humpolicek/Wiki Commons