Re: Aikido. The Martial Art.
I'd like to also point out that the most dangerous throws (and the hardest I've ever been thrown) was not by my aikido teacher, or my judo coach. It was by a wrestler.
Wrestlers are not taught explicit ukemi that I know of. None of the ones I have talked to said they learned how to fall. Yet the throws they do are very very hard falls to take.
Injurys due to throws for me in my life:
Judo: maybe a 3 or 4 (usually broken fingers)
Wrestling: Probably 7 or 8 (usually my neck or shoulder)