Let's see...
Putting my head underwater
Heights... but not the "Hi, I'm in an Airballoon or on a skyscraper" heights. More like, "OMG, I am standing on a stool or chair!!
"
Low-flying birds, especially when I am driving.
And of course, birds flying overhead.
And weird fear: I'm a diabetic and I am scarred of needles/blood. I can give shots and stuff just fine, but if I have to watch blood, medical shows, needles etc, I freak out. Can't watch.