"Spastic octopus!" I love it. My middle cat does a good imitation when I clip her claws. She can practically turn herself inside out as she wriggles to get away. She also screams at the top of her lungs the whole time I'm clipping them, and the other cats come and sit at my feet and look inquiringly up. "Are you torturing her? Why is she making so much noise?" The little Lilac wriggles in a determined way for awhile but usually gives up and goes limp after a few minutes. My Blue boy sits up on his hindquarters in the crook of my arm and says and does nothing - until I get to the third and fourth claw on his left forefoot. Then as I snip the clippers he hisses - once for each claw. No further comment. Maybe those two claws are exceptionally sensitive.
We almost lost Finny (the Blue boy) about four years ago to a mysterious virus and low grade fever. We wound up having to administer subcutaneous fluids at home once a day. My daughter would hold him on the kitchen counter while I popped the needle in to the slack of his flanks on each side. He stood perfectly still, but he would take my daughter's hand in his teeth, very gently, and look around at me as if to say, "Now don't make any sudden moves, and nobody will get hurt!" He never did chomp down on her, but I was VERY careful! (my daughter was steady as a rock, she'll make a good vet some day if she decides to go that route.)
NONE of my girls will let me clip their claws. They're too spoiled and know they can make me stop. The groomer or vet does it and they just hang there like your Blue boy. They're all brats and it is amazing that all the strays who wandered in here are feisty females. Maybe if we had a male or two it wouldn't be so much of a zoo.
Two girls want to dominate, one is feral we got around 10 weeks old, and one is a loner who defends her two-room territory, which is okay because that's where I work and play.