Sokka made a face, and it wasn't one that said he understood exactly what his roommate had been saying. He did, however, get the "impossibility" stuff there at the end. "Hey, unless you've had one camping out on your head while its mom's trying to flatten you into the ground, don't go telling me what's impossible and what's not," he snapped. That had been a traumatic experience!
After a little more thought, Sokka was able to decipher some more of what Shinichi had said earlier. "And they can too be combined! Sure there's just bears and lions and other stuff around, but they're pretty plain. So are other things, but they're not plain plain. Like... there's all kinds of bears! Armadillo bears, platypus bears, gopher bears..." He listed off on his fingers.
Re: M77
After a little more thought, Sokka was able to decipher some more of what Shinichi had said earlier. "And they can too be combined! Sure there's just bears and lions and other stuff around, but they're pretty plain. So are other things, but they're not plain plain. Like... there's all kinds of bears! Armadillo bears, platypus bears, gopher bears..." He listed off on his fingers.