Have you ever had a panic attack on a plane?

I have flown all over the world but still do not like to fly. I do not like the fact that there are so many people sitting so close together in such a small area for such a long time. It makes me crazy. If the plane is not so full, I am fine but if it is full, I tend to panic during long flights or tarmac delays.

Have you ever had a panic attack while flying due to feeling cramped or just because you were afraid?