Axes won't chop trees with a series of unfocused blows but must instead be carefully aimed and leveraged, slicing into the same point time and again. Lighting a fire, meanwhile, requires you to knock two bits of flint together over dry grass.

In many cases, you need to consider the angle and speed of your approach. Swing a hammer at the wrong angle when crafting and you can hit nails in the wrong direction or even break materials. Chiseling away at wood needs just the right touch or you might end up making a soup ladle by accident.

Of course, you're not learning from the real world, only from some programmer's guess about the real world. In the worst case, VR will lead your body astray like Facebook leads your mind astray. But in the best case, with increasingly good real world modeling, you could get halfway to a difficult physical skill with a lot less investment.

New subject. My favorite sport is women's soccer, and the NCAA tournament starts today. I like top-tier college soccer better than pro or international, maybe because the substitution rules allow the players to play harder more of the time.

Here's a highlight video of a really fun player, USF's Sydny Nasello.

Penn State's Kerry Abello can do really long flip throws.

And last week my home team's most dangerous player, Alyssa Gray, hit a 35 yard golazo.