Think first: I’ve had regular laining jobs since I was 16, and now I’m a grandfather. So its been a few years. My reputation is such (I like to convince myself, that is) that people who daven at my regular place wouldn’t dare correct me like that. So I’m not used to someone who has the aliya even trying to chap something.
This fellow was a guest. Every year or so he comes to town and tells me how much he admires my laining. He then waits to pounce on me at the first opportunity.