Just came across this post via engadget:
LegShocker , created by Cologne-based art group FUR, is a painful interface for PlayStation2, in particular football/soccer games.
The players, before putting on their football footwear, each slip into the LegShocker, a hand-sewn shinpad. A small hammer is activated and hurts the leg each time a player of the opposite team makes a good move against yours or scores a goal.
So in short, you can now get injured by getting 'hammered' playing Fifa on the PS2... taking things a bit far if you ask me.