In work-conscious Hong Kong, it's the ultimate no-no that's on a par with back-stabbing your colleagues and worse than cheating on your taxes.
I am talking about power-napping - 20 minutes of shut-eye in the middle of the day to allow the brain and body to recharge.
One afternoon last week I trudged to Cyberport, where I was invited to try one of three space-age sleeping pods designed by Metronaps - a US company that runs a sleep clinic for weary office workers at New York's Empire State Building.
The pods, recently imported and installed at the Bel-Air on the Peak clubhouse, retail at the not inconsiderable sum of $100,000, including shipping costs.
They consist basically of an S-shaped mattress tucked into a massive visor that shuts off the user from the outside world. Using the armrests, the pod may be reclined to a relaxed sleeping position.
There are also lighting controls, a timer and a sound system that plays one of four 'natural' sounds to help you drift off to sleep.
There was also a mysterious white disc connected to the chair, and when no one could tell me what it did, I just hoped I was not sitting in an ejector seat.