Ok, I will try to answer all of your questions...
Just one hit, not multiple hits.
I cannot say anything about the religion or race of the hitter.
I cannot predict the injury because that would take the chance element out of the game. It's whatever injury you are willing to risk, I guess.
I do not know who 'oofty goofty' is, but I assure you that this idea was original when it was first conceived, this last friday. If anybody else thought of it first, I did not know about it.
The only clothing you are allowed to wear is a teeshirt.
Thus far, I've had a range of responses, from $20 to $1,000,000. The person who asked for the million bucks applied what is commonly known as the Learned Hand formula from torts and determined that there as at least a 1/1000000 chance of paralysis, then determined that paralysis, to him, was worth a $trillion dollars in compensation, then adjusted the compensation accordingly. His answer was faulted for reasons I won't go into, but that was the approach he used.
I'm asking for $5000, because the chances of a broken rib or bruised kidney are high enough to be worth considering.