When I have a panic attack, I'm overwhelmed by the gripping reality of the situation. It's  really me, really my life, it's actually the present. I feel like I'm too conscious. Whenever I feel normal It's like Ive got all these autopilot features and I have a script, but I have my panic attacks whenever I loose the plot and I feel like I'm just out here on my own, a consciousness somewhere in the universe. I feel like Ive peeked behind the veil of reality and saw too much. It's such an overwhelming feeling that I go weak and I need to support myself. Sometimes I shake my head to get rid of the thoughts.  
Is that normal? Im just wondering if maybe that sounds more like a type of seizure because in a way if feels like all my brain cells are going off at once. I feel like if I let them take over I would be thrashing around on the floor more than running through the street.   
What are people's panic attacks usually about?