Sometimes when your calcium/magnesium ratio is off, you can get twitching. I get one in my diaphram that feels like a fish flopping in my chest. If you are low in calcium intake, or very low in magnesium, the muscles do a dance of sorts. So you could try to balance that out.
(February 2017) A concrete slab is a common structural element of modern buildings. Horizontal slabs of steel reinforced concrete, typically between 4 and 20 inches (100 and 500 millimeters) thick, are most often used to construct floors and ceilings, while thinner slabs are also used for exterior paving.
1. a broad, flat, somewhat thick piece of stone, wood, or other solid material. 2. a thick slice of anything: a slab of bread. 3. a rough outside piece cut from a log, as when sawing one into boards. v.t. 4. to make into a slab or slabs. 5. to cover or lay with slabs. 6. to cut the slabs or outside pieces from (a log).