Those were some bad looking bites!!
I have to say the worst bites I ever had were from BH Caiques. One was mine, she would get in a mood and come after me and hold on and grind. The other was a friends, the bird was very friendly to me, I had her on my finger to put her back on a perch and she grabbed me. I would hate to have some of the bite like shown.
My G2 will use his mouth to hold on, or to guide my hand to scratch his head, but tonight he used his beak to grab my nose, it was meant to be gently but was a tad to rough. No marks though.