Anytime you bend a ski you have stored energy in the ski, that energy will be released no matter what - as you have noticed.
That energy can be harnessed to:
1 - Accelerate you out of the turn, one reason an experienced racer can accelerate out of every turn - going faster than many folks going straight.
2 - Rebound you up into the air. Very useful when doing turns in extreme steeps and other situations.
3 - Rebound you laterally across the snow (essentially the same as #2 - just a directional difference).
4 - Any combination of the above.
The ski is going to snap straight after you've bent it no matter what, its a matter of timing and tactics to learn how to harness that energy rather than let it dissipate uselessly.
The stored energy also can be counter productive when not harnessed. It can cause or enhance a skid, when it snaps straight. It can unexpectedly launch the skier, often the cause of getting caught in the 'backseat'.