All I remember about this movie is that a young boy (age 12-15) is trying to walk home and several other kids his age keep attacking him to test his kung fu, and he keeps having to defend himself, which he does successfully.
Later, at the dinner table, he and his father constantly test one another's kung fu, and they begin competing with their chopsticks, both trying to grab at something on the table, and their competition escalates, until the mother gets upset at them both for constantly competing at kung fu, even while they are at the dinner table.
Whoever answers this is an official kung fu movie genius.