Anyone know what is a panic and an anxiety attack like?

Sxs: Panic attacks can develop rapidly and can include: marked anxiety; rapid, pounding heart beat; chest tightness or pain; shortness of breath with hyperventilation; hot or cold flashes; a sense of butterflies in the stomach, nausea or even vomiting; tingling of mouth or extremities; increased sweating; feeling faint or lightheaded; headache, shaking; difficulty swallowing or throat tightness; a >>.