Lee does his very best to save an ancient giant vase in the middle of a fight with two mooks... then gunfire shatters it moments after he's won.
The first day we see Soo Yung going to school in America (granted, two months after she and her father moved to L.A.), she's quite exuberantly singing Mariah Carey's "Fantasy" in the back of the car. The looks on the faces of her bodyguards in the front seats are just hilarious.
In the second movie, during the spa fight, Carter yanks off the towel of a gangster, and takes a quick glance:
"Do you understand the words that are coming out of my mouth?!" and it's Call Back: "Do you understand the words that are coming out of my mouth?!" "Nobody understands the words that are coming out of your mouth!"
The bloopers, from all three movies...seriously. You will bust a gut.