Animal Crossing: New Leaf/Luck

Falling over is a sign of bad luck.

Luck is a hidden feature that affects gameplay in subtle, but often noticeable ways. At the start of each day, your luck for that day will be determined randomly. Luck can be manipulated in several ways, such as by wearing a particular type of clothing or arranging furniture in a certain way. Some items can also affect your luck adversely, such as the King Tut's Mask.