Our local cable company is Comcast. I was having high-speed Internet installed at my apartment, and a Comcast guy showed up. He started spouting off technical jargon about "bouncing signals" and stuff that I knew was complete nonsense, all so he could buy time to have a smoke and talk on his phone.
I was starting to get very frustrated that he'd been at my house for a couple of hours and wasn't finished with the install. I'd specifically requested that he not install any software on my computer, because I knew it was not necessary for using the Internet. My roommate, however, had not made the same request.
After some time, my roommate had to leave, and I was left to supervise the Comcast guy. I went into my roommate's bedroom to find him scratching his head as he fiddled with her Mac. He was kinda sweaty and really mad and looked up at me and asked, "What kind of computer is this??"
"It's a Mac," I said.
"What kind of Windows are you runnin on this thing??"
I tried telling him that it did not run Windows, and he refused to believe me. He got so frustrated that he actually ended up cussing at me and comparing me to his ex wife.
He got fired.