Asparagus. Nothing else even comes close. When I was a kid if somebody was cooking that stuff, I had to leave the NEIGHBORHOOD, just leaving my own yard wasn't gonna cut it.
Balut - a duck embryo sold as street food in the Phillipines ..it would make Zimmerman gag!! Raw turtle eggs in Honduras also deserve a worthy mention.
I surprised myself by really liking what were quick deep fried parsnip sticks... at a local italian restaurant here. I'd hated parsnips that my mother made, way back when.