Lung Tsui

AKA The Leg Fighters Tan, a Northern Chinese kung fu expert, kills a man using his lethal bootwork in self defense. He is then hired to train a bratty princess and her servant in kung fu. In the meantime, the brother of the man Tan killed is out for revenge and he'll get him at any cost. (imdb)

Director Tong orders a box to be moved during a shoot. His only thought was moving a mound of snow to make the scene look a little better. His crew warns him it's a devil's box but move it anyway. The first guy to pick up the box dies shortly after, having accidentally fallen off a roof. Tong's work declines, as does his health. He is diagnosed with a brain tumor and begins to be pursued by… something evil.