Goal Antics
After scoring a goal, while the player is doing his victory jog and during the instant replay, pressing the C buttons causes sound effects. Top is horns, left is the crowd yelling, bottom is a drum, and right is a man yelling "Gooooaalllll!"

Crowd Boo
On FIFA 64 at any time during game play press the control pad (NOT STICK) in any direction. This will instantly cause the crowd to boo. It can only be used about 3 times in each half.