A Spontaneous Trot
I've lost enough weight now that I sometimes break into a trot, or even a run, without thinking about it. Just twenty or thirty yards, to catch a bus, say, or to "run back to the house" to get a notebook.
If you've never been heavy enough to have gradually subsided into never going faster than a walking pace, without due consideration and examination of consequences ("Are my knees up to this today?" or "Just how stupid will I look, flopping along?") you probably have no idea how wonderful, how liberating, how exhilirating it is. Picture looking up at the blue sky and finding yourself just flying up into it -- that gives you some idea.