Oof! My Yoda is/was like that.
Let's see: he fell off the third floor windowsill and survived, scratched me half to death when little, jumped into fish tanks and buckets of water many times... He has to be sedated at the vet if anything more than some injections are required. We discussed his behaviour and she said that she had other clients with a cat that was like Lil Guy and Yoda, also found in the street, who had spent a fortune trying to discern whether their cat had a head injury. No conclusive result. My vet said that some cats are just like that.
On the plus side, Yoda has mellowed with age, he's seven now but he's still difficult to handle. Getting another young cat his own age when he was about a year old to play with did help because they were both boisterous and loved each other. Problem then was his buddy was hit by a car and died :(
My thinking is that Lil Guy is feral-born, like Yoda, and he just has a little bit of tiger in him