When a professional cricketer running in to bowl sees his England teammate—a posh amateur—practising his golf swing, the author's tut is all but audible.
We care a lot about where you stand on an escalator, and we will tut and shake our heads if you stand in the wrong place, and I always see tourists do this.
She would complain noisily to Ashok or the building's management about Agnes playing the piano, and if we passed her in the corridor she would hurry by, occasionally letting slip a vaguely audible tut.