This is the scene where Michael Miu places a mop in between the door handles to prevent Jessica Hsuan from chasing after him. Jessica eventually frees herself by rapidly pulling on the door.
In this first take, Jessica was able to finish the scene successfully; however, the second time around, she opens the door and the mop handle hits her in the chest.
Jessica Hsuan: "Aiya! Oh my god!"
Crew member: "Are you okay? You hit yourself. You really hit yourself".
Jessica Hsuan: "Wah! It really hurts!"
Personal Note: Ha ha.... This is quite funny! :D Poor Jessica!
*Credits to HKLOVE.org