Tom Hanks knows how to fake-piss

I just saw The Green Mile last night, and without doubt Tom Hanks' finest moment in the film is the tight shot of blissful relief spreading over his face during his first piss after John Coffey heals the urinary infection.

It reminded me of his endless pissing scene in A League of Their Own, which, until I saw The Green Mile, I considered his finest on-screen performance.

So, is this, like, his hidden specialty? I didn't see Philadelphia -- does he piss in that?