glad to see your ok, but i've been advised in the past not to use 4 point harness such as this without a roll cage, imagine if the roof had gave in further, i've always been advised that if in an accident and your going over lay accross the passenger seat and hold on!
in answer to this,the hight of the bucket protects my head by 4 inches!a solid steel framed bucket and harnesses are totally safer than a standard seat and seat belts,as told to me by the firebrigade,paramedics,police,and brett castle(pro drifter)phil morrison(pro drifter)julien smith(pro drifter)shane lynch(pro drifter)!all friends of my dads!
i dont know who advised you to try and lie over the passenger seat in an accident?i kinda found in the millisecond i had to brace myself,i wouldnt have time to undo my normal belt,lay across the handbrake,and pray!!!!!
also just to clear it up i had bounced off the bank on the otherside of the road which was about 3 foot high!!!