Aug 12, 20080
Something completely different…
Sport stacking (formerly known as cup stacking and commonly known as speed stacking) is an individual and team activity played using plastic cups.
Participants of sport stacking upstack and downstack cups in pre-determined sequences, competing against the clock or another player. Sequences are usually pyramids of three, six, or ten cups. Proponents of the sport say participants learn teamwork, cooperation, ambidexterity and hand-eye coordination.
This is amazing (and I think this is the current world record):