I am so lame. I can't think of any halloween experience from high school at all. Not one. I remember dressing up for Senior Ball (we had a masquerade--I went barefoot and pregnant btw) but that wasn't halloween.
My earlier memories were dressing up like a witch for--like 4 years in a row. And we lived in Wisconsin and mine was the mother who made me wear my winter coat over my costume. Grr argh. That drove me crazy! Of course, if I still lived in Wisconsin, I'd probably have done the same to my kids. But still. It was awful. I didn't care how cold it was, I wanted everyone to see my costume!
I know I'll also never forget the smell of those plastic costumes. You know the ones. With the mask that had teeny tiny holes for seeing and breathing (ha-ha)and the strap that dug into the back of your head. Yeah, the smell of that plastic is forever a stain on my senses.
But my fondest childhood halloween moment is this: