[JavaBrewer]

Heights, or more likely falling from height. I have zero issues flying, even when with my pilot friend in his piper cub with the cabin sides folded down. But standing on elevated position is not good. Example, the wood grandstands you find on sports fields, I cannot go up more than a couple rows. Outside stair cases are also no go. Heck my knees start knocking inside a building more than a few stories tall. I thought open water diving would terrify me but at 100' feet deep have floated over the 20K foot drop off in Grand Cayman with not a care in the world. Strange.