I was writing an exam. The guy in front of me kept clearing his throat; it was very high pitched. Then he had a great, hacking, coughing fit. I thought, 'Oh, thank [diety]. Now he'll stop clearing his throat!' Nope, right back to a little 'ahem' every couple of minutes. I thought I was going to go mad. And I made sure never to sit anywhere near that guy again.
I had a recent proctored professional exam. It's VERY regulated, they even do a metal detector wand before you're allowed into the testing room. There was a girl who kept clearing her throat every few seconds. It was very distracting.
To be fair, I had to clear my throat a few times, but I tried to save it for when it was unbearable. And I talk to myself at work sometimes too, but at the test I put my hand over my mouth and am afraid to breathe when I'm moving my lips, I do not want to be that person who bothers everyone else. And if someone said something to me about talking at work, I'd try to stop. Usually it's muttering under my breath, so it's hard to hear.
There's a guy I work with, sits diagonally from me in the cubes. We sit facing opposite directions. I'm facing NE, he's facing SW, for example. So he turns around and starts asking me a question, but I can't tell if he's actually asking me a question, asking the girl across from me (also next to him), asking in general at someone walking by, or just talking on the hands-free headset on his phone. Girl and I had to explain to him today that if you want to ask us a question, start by saying our names until you get our attention, then continue with the question. Otherwise we're just not going to hear a thing.