Stop lying ppl. What happened was Lee accidently struck Chan on the side of the head with one of Lee's double sticks and Chan was stunned but didn't appear to be injured too badly. After the scene was complete, Lee dropped his sticks and ran to Chan asking if he's ok and from there on they were friends and Lee would offer Chan extra work on the set to earn extra money throughout the set.  This story is told by Chan himself numerous times.

I wonder when AI will able to tell me I'm looking at BS AI.