Buddy you are so fortunate!!
My step father had a similar incident 47 years ago in a TR4 when his rear spoke wheel collapsed and it planted him sideways into a lamp post! OK so without seat belts and a roof he was thrown out but his hip is so badly smashed that to this day he limps and is in pain.
Someone was looking out for you, be happy!!!!!
Glad you are OK (relatively speaking of course) and will be back to your old self soon.
BTW, I read your entire thread - what a super effort and a great result that car was! I do hope you repeat it.
Ali K