Events with the sabre, which has a dual edge and a curved guard on the handle, are the only ones where a fencer can score with the edge of the blade, not just the point.

WSJ: The Finer Points of Balancing Fencing and Family

Using beams of electrons, he carved a cantilever out of the edge of each crystal (think of a knife held down on a table, with the blade sticking out).

ECONOMIST: Small-scale physics