this guy high jumped once in high school several years ago...6'8" or something with no training...
he decided to come out for track, practiced for 2 days, and jumped 7'3.25"....IN TRAINERS (lets not turn this into a rexing thread though...)
heres the video
http://www.polevaultpower.com/media/video/dthomas222.wmv
ther eis also a story on trackshark.