I have always been a little bit afraid of being upside down. I trust that my body can do it, but for some strange reason just don't seem to think that I can. I can get halfway there or three-fourths of the way there, no problem, but actually doing a headstand or handstand is just beyond me.
Today I did a headstand. It was against the wall at 1 am, but it was a headstand! And it was surprisingly easy, once I decided I was going to do it and remembered my technique and alignment. Wahoo!