To answer the implied question about Australians in an earlier comment, I saw the film for what it was: a spoof comedy. I thoroughly enjoyed it as such. I didn't look for errors of continuity or consistency; that seemed rather pointless; or for any hidden meanings. I simply took the gags at face value and enjoyed them.
I would not draw any conclusions about "real" Asians from this movie; any more than you would say draw conclusions about any other nationalities from comedy movies. I guess that Woody Allen comedies would be a perfect example of how that would not work.
As for the best line, in my opinion it is:
"...and then I got run over by a Toyota. Oh, what a feeling".