"Fish, plankton, sea greens... protein from the sea!"

The DVD of the original Rollerball includes a memory game in which you have to correctly sequence 16 thumbnail scenes from the movie. Only the brave will manage to slog through and receive the ultimate reward - a 10 second clip from the flick you've just finished watching.

Still, Rollerball certainly represents a more well-heeled version of the 1970's future.