Technique for running on ice

[bennyk]

What is the optimal technique for walking fast/running on ice? I tend to stiffen my legs a fair amount.

I think this is because with stiffer legs, you can't rapidly apply force in a different direction, so you can't break free as easily. This method also "feels" much more stable, I guess because your brain/inner ear is more balanced.

Anyone from, like, Montana care to settle this?