Suburb's idea. Implemented this as mode 7 for the push trigger to avoid having to make another trigger, at least for now, and since it then works with the prediction already in place for pushes and so on :)
So,
- create trigger_push
- mode 7
- set speed 1 to make it a trigger to ENABLE gravity, or just leave it out to disable gravity. If you set speed to same value > 10 or < -10 then that will be set to your Z velocity.