I actually just did this. It occurred while jumping for ball, not during the landing but while actually in the act of jumping I felt it snap. The normal doctor said it was plantar fasciitis (which is inflammation of that area) which didn't make sense to me because it happened suddenly so I went to a specialist who properly diagnosed it. He says it was likely caused by me starting and then stopping a walking regimen which probably reduced the flexibility of the ligament so when I jumped the wrong way it tore.
If you fall down a curb! Lol
Run on the edge of a sidewalk and then "accidentally" slip on the side, but the sidewalk has to drop off on the edge. =]
I am trying to do the same thing! I really need to get out of a dance concert!!
Stand on your tippy toes for 30 seconds while trying to dust a book shelf.
I guess it really depends on how determined you are to do it. If you really want to, I'd suggest sticking your foot in to some sort of farm machinery.