off the top of my head:

Pressing buttons simultaneously in the reactor

Squat competition in the gym in Wall Street Market

Escaping Midgar on motorcycles

Hunting chocobos

The Fort Condor battles

Submarine battle

Mr Dolphin and CPR

Temple of the Ancients

Snowboarding

Meg and Mog in the Gold Saucer

edit: also marching in junon parade and the slap battle with Scarlett