At one time I held down four jobs. I worked at mental health all day full time plus overtime and taught music lessons at two stores after working at mental health. At night I was a security guard all night long. However;I have never ever seen anybody as animated and work/serve longer hours than Amma.
What i mean by inertia is not having the energy or pazaz to be cheerful and animated when we work hard. It is a challenge. Clearly in Amma I have seen cheerfulness and energy after serving an unbeleavable amount of time.
Used to be in the restaurant biz for years, this kind of work was constant moving, on your feet most of the time, constant work, not sitting or standing or casually walking, etc., It was a lot of things at the same time quickly and efficiently, for hours. And, yes you had to put up (well OK smile and work with) freaked out waiters that couldn't handle being constantly busy for hours with no break, that's when you would see some very strange expressions and behaviours at times. After some years of doing this, not to mention all the extra curricular activities that occurred most every night, you got used to expending that amount of energy. Some folks are not cut from that mold.