Triangular Peg Solitaire is a simple, classic puzzle that still has the power to confound. If you're not familiar with it, or it doesn't seem that difficult, try it for yourself (Javascript required).

In the above video, you see “Kenny” solving the puzzle at a Cracker Barrel in Pennsylvania.

Update (1/16/07): “Toby” can also solve the Triangular Peg Solitaire puzzle. “Thea”, after a few false starts, manages to solve the puzzle, as well.

Video Format:
YouTube