What's with Lin falling and stumbling all the time?

I think it has something to do with Taiwan being an earthquake zone.

 

Best part about that is when you live on the East coast and everybody's freaking out over a tiny little rumble like the world is going to end. b**** please that's like a monday night in Taiwan.

 

Unless like Harden's cutting and bumping early (create physical contacts) against other players along his usual straight line driving, Lin drive and seek the best timing to finish his drive. That means he waits till his defenders make their moves before he finishes his drive. His finish timing usually happen right at the end of his ability to hang in the air unless he is sure he has no one to guard him.
Thus he will fall and stumble to the floor right at the end of his drive because he is no bird and did not study under Einstein at Princeton.