I stood on the dividing line between east and west in Russia/Central Asia, and I have been in Calcutta, India. I am so bad with a map, I don't know which one was farther from my Texas home. India felt like it was farther away!
The time I was most afraid in my life was really stupid: I was washing my hair with my eyes closed in the shower, and my husband was out in the water closet, and when he left, he switched out the lights by habit -- but I didn't know he had turned off the lights, and when I opened my eyes, I could see nothing, pitch black! I thought I had somehow disconnected my retinas by vigourous hair washing. It took my breath away! I closed my eyes again, and rubbed at them, opened them, still nothing but black. Thank God then the lights came on and my Mike called, "Sorry!" Whew!
I guess I am pretty lucky if the scariest thing I remember was a few seconds of being blind. I'll pass this question along:
What's the scariest thing or the thing you fear most?