One fine afternoon in the office, a colleague from another team walks up to my cubicle neighbour and asks a question. As my neighbour embarks on a lengthy reply, the question-asker reponds to every set of six words with "Mmm hmm".
Just as I begin to get seriously annoyed by that sound, I get an instant message from the other cubicle neighbour, saying: "If she says 'Mmm hmm' one more time, I will kill her."
And, of course, the question asker said it again.
I couldn't help it. I burst out laughing, getting a strange look from her in the process.
I guess it was one of those 'You had to be there' moments.