In {HEAD ~ another version}, the restraints are pulled back against {TAIL ~ the knees} when the user sits down 
In { HEAD ~ another version } , the restraints are pulled back against { TAIL ~ the knees } when the user sits down
OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH