I am a excellent marksman and also good at sword
Fighting

Not really a secret, but I know how to survive if I have to.

I can write forwards, backwards, sideways, and upside down. I can also copy signatures really well, and write with both hands and both feet

Jaja idiomas, saludos

Id tell ya if i knew
...

I don't think any of my skills are secret

I can touch my nose with my tongue?

I can tie my shoes without looking does that count?

I keep people's secrets, secretly.