I've only had a couple panic attacks in my life and they had to do with an accident I had. I had ridden my bicycle 20 miles and was tired and crossed a major road a block up from my house. I had thin tires on my bike and rocks can cause problems, so when I saw one in the road, I swerved to not hit it with the tire and didn't see that in the front of a parked truck was a parked car. I hit it and caused $3,500 worth of damage!
I also broke my tooth, had to get stitches on my face and bruises all over. For a couple nights after I had panic attacks from that accident.