Near the end of the movie, during the big fight scene. Jackie chases JunTau up the rafters to the top of the building. JunTau ends up hanging from Jakie's legs, while Jackie is hanging from a rafter. Watch closely, the money from the suitcase that was spilled over the edge is floating to the ground. In some camera views you can see money still floating, and in others it is all already resting on the ground. It switches back and forth several times. It's floating, then it's all on the ground, and then it's floating again.