Years ago, we used to loosen off the mainsheet and the traveler sheet, turn, and just let everything fly across.....then one day, we blew up a traveler car on a H16.
Today, we sail in a more controlled manner, and we 'judge' the wind and the waves with eyes that are better trained....we pick our gybe spot a lot more carefully.
Gybing: we usually begin our turn,
then center the traveler and tighten up the mainsheet,
pass through the eye of the wind,
then release the mainsheet under control, and of course the traveler.
This prevents slamming, and allows for more control.
With practice, this tightening/releasing can happen very quickly.
We also have a figure 8 knot tied in the mainsheet, so that when the traveler side is fully out, the knot prevents the traveler car from slamming into the end of the track.
1989 Hobie SX18 Sail # 1947
'Only two things are infinite, the universe, and human stupidity. But I'm not sure about the former.'