That is a pretty cool catch for sure! I don't envy you taking the hook out.
I had to do that with a snapping turtle one year that slammed a Zara Spook while bass fishing. I had to remove the hooks from it tongue and it's front foot (from trying to de-hook itself apparently). That turtle was nasty. We found a 2X4 for it to bite on while we removed the hook from it's foot.
I caught a large slider a couple years ago on a plastic worm and felt like I was reeling in a rock only to find that surprise on the end of my line. It was fair hooked too but not in a good mood.
Hey.. Whats a Colorado turtle doing in Texas?
He was on a rafting trip!