Completely gobsmacked, the manager shoves her out of the way and proceeds to neatly assemble the correct burger in a few seconds, and hand it to me with a disbelieving expression on her face. I assume that person didn't work there much longer. I can only wonder how she made through Wendy's rigorous hiring process in the first place.
I went to Wendy's to get a burger, and asked for it with ketchup only. The woman in the kitchen grabs a bun, scoops up a big glob of mayonnaise, and slowly smears it on the bun. I explain "I wanted that with ketchup only." She tosses the bun, gets another one, and, to may amazement, grabs an even bigger glob of mayonnaise, and even more slowly, smushes it onto the bun. "I SAID, ketchup ONLY. ¡Solo ketchup!", I complain, more loudly. The manager overhears this and comes over, takes the bun from her, flings it into the trash, says right to her face "KETCHUP. ONLY." So she very slowly picks up another bun, and right in front of the astonished manager, scoops up a staggering amount of mayonnaise, and proceeds to very slowly slather it onto the bun.