There was a terrible BK on 5600 S 3500 W in West Valley or Magna. I ordered a chicken sandwich with no mayo. My sandwich had mayo on it. I took it back to the counter and requested one without mayo. An employee scraped the mayo of and have me the sandwich back. I went back to the counter and requested a new sandwich. The employee told me to sit down and he'd bring it out to me. I told him I was going to stand and watch my sandwich get made and that I'd throw it at him if it was incorrect again.
I wouldn't handle the situation the same way now. I was a stupid 23 year old kid.