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.
(post #53196, reply #4 of 18) Here in the Boston area, a mud slab is what we pour in a crawl space foundation. Usually 3-4 inches thick and floated but not finished troweled. It's just a rough slab and is better than a dirt or crushed stone floor. Most of the Architects here spec it .