[ino]

> ride a bicycle without holding the handlebars

That's because you're pedaling. If you stop pedaling, you can't.

[lkbm]

I don't know if you meant "not moving forward", but I usually don't peddle when I make my hands-free turns. Coasting works fine.

[lmm]

Sure, but if we're talking about steering we're presumably talking about turning while pedalling and moving forwards.