ArkRescue
Adopt me please !
Sounds great - I've actually had cats that went crazy upon being trapped and then later turned out to NOT be feral .... so you're never really sure until they have time to relax. The degree to which a cat is feral can also vary of course. I have a feral that now is more like a skittish tame cat than feral after years of being an indoor cat.
I recently trapped a kitten that made a home in my hay shed. I kept her in our upstairs bathroom isolated from all other pets until I could get her in to be tested for FeLV and FIV. She was negative, so I got her vaccinated and managed to find her a great home! She was pretty wild when I caught her, but she calmed right down and turned into a very nice kitty! Hopefully your boy will calm down when you catch him too.