Face shield, goggles, mouth guard integrated in helmet, ... yet the mass of such still swings with the head mass, as the neck cavity is not filled by toroid brace. Snap-back of carabiner ?
================== Noting a flash: Unbaked: Trigger a full-body airbag (harness integrated), but with a deflation system for use when wanted. Or: Pilot-powered full-body airbag inflation with also deflation choice. Coming in for a challenging landing and wanting full-body airbagging?
[ ] See BobK's "Safe-Spratt" share. (historical section in our forum)
=========================== Safe-splat devices were often used to protect a frontal propeller from touching the ground. Also, some early "lake flying" had a frontal float to keep the pitch-in from occurring.
Image from 1913 edition of Jane's All the World Aircraft.