Could you tell me what happens to a person that goes into a panic attack ?

Panic attack: A full panic attack is s sudden, "out of the blue" experience of intense fear and feeling that one is going to go crazy or die, accompanied by physical symptoms like rapid heart rate, bounding pulse, smothering sensation, dizziness/lightheadedness, chills or heat flush, tingling sensation, & chest pressure or pain, etc. It peaks within a few minutes & dissipates over ~30min. There is help!

Panicattackexperienc: I feel empathy for those who go through Panic attack, as one feels intense fear or dread and agonizes that he/she does not have control and may have another attack--