When Lai is flipping through the pictures at Frank's house, the photo of the little boy with the monkey really is Jason Statham.
The trailer for the film showed Frank deflecting a missile with a tea tray. In the same scene in the film, the assault on Frank's house, there is no sign of this in the released version. It was taken out at Jason Statham's request because he didn't think audiences would believe it.
When Lai is cooking breakfast for Frank, she accidentally burns her fingers, then touches her ear. This is actually a method used to help cool a burn as the earlobe helps to disperse the heat.