Ah, the dark ages. I was a shop assistant for 9 months and it truly was the worst job ever. I was yelled at for no reason at all other than doing my job.
Old man: *leans over counter, groans*
Me: "Hello sir, may I he..."
Woman I just assisted: "I'm sorry, before I go, can you tell me where (name) street is?"
Old man: *groans some more*
Me: "Sure, *gives directions*"
Woman: "OK, thanks, bye!"
Me: "Hello sir, ma..."
Old man: "IS NOBODY EVER GOING TO ASK ME WHAT I WANT!"
Me: "I'm sorry sir, I was just giving her some dire..."
Old man: "WHY WON'T YOU ASSIST ME!"
Me: *nervously stammers* "I... I was working..."
Old man: "FUCK YOU! GO TO HELL!" *storms off*
Me: *red face and dropped jaw, hears other customers laugh*
On top of that, a self-righteous coworker told me that I had handled the situation poorly, that I wasn't kind enough... yeah, sure... Later on, I found out the old man used to be the city mayor from way back, and that he had been nuts for a while.
Also, the boss and me were once robbed by an old gypsy woman. She walked in on a slow afternoon, made small talk and asked nicely for a 1€ flashlight, insisting on paying with a (real) 100€ bill. It was super suspicious but I obliged. She demanded her change in small coins plus a 50€ bill, being awfully adamant about it. At this point the boss came out and she began her act: went full-bitch mode, threw the flashlight back to us and demanded her 100€ back. I told her to give the 50€ bill back first, but she insisted I never gave it to her. This went on for a while until she screamed at the boss and told him to check her purse to see she wasn't lying. Nervously, he actually opened the purse but immediately gave it back to her since the whole thing was ridiculous. Right after that, she started touching her deformed breasts and "sensually" said we could do a body check. The boss asked her to leave and just like that, she got away with 50€.
At least I wasn't told off by the boss, he was probably more humiliated than me.