“坐睡功”, 我五十後不學自通 "Sleep-Sitting up Kungfu" ...

No need to go up to Shaolin Temple or Wudang Mountain, 

I learn to quickly goto sleep mode in a sitting posture 

anytime I need to;

after 50 

...

KL China Town 

Olympus OMD EM1 m.zuiko 75mm 

ISO 500 f2.5 @ 1/250