I was flicking thru one off the innumerable Bruce Lee books at my local bookshop the other day and I read that Bruce Lee studied some Hung Ga.
It occurred to me that that's where he might have got his 'cat calls' from as they sound similar to some of the emotion sounds in Hung Ga.
This is pure speculation, I was just wondering if anyone had any opinions or knowledge of the origin of his 'cat calls'.