Not random to me, but perhaps seemingly so to others.
Recent example: I was speaking on the phone with a client (he was on a speakerphone), and I heard his wife say something like, "...get off that phone..." and "...those mongrels...," and she sounded rather angry to me.
I knew these facts:
- He has two dogs.
- His wife is diabetic.
- She sounded angry when I overheard her on speakerphone.
- I had spoken with her briefly on a couple of other occasions and her tone always seemed very pleasant.
So when I spoke with him the next day, I asked if his wife had had a diabetic hypoglycemic episode the previous evening, because I had interpreted her comments and tone as perhaps a symptom of neuroglycopenia. I didn't explain this, and he seemed completely confused as to why I had asked, although he didn't press the issue (mercifully).
She was fine, but had become rather annoyed at something one of the dogs did, and so I got only partial information that evening. Had I overheard something like "carpet" or "rug" or "sh*t" I would have arrived at a different conclusion and not even bothered to ask.
I should just stick to business over the phone.