CARTMAN: Yeah, I'll see you around. [leaving and still speaking] Sure is too bad about my grandma, though. SCOTT: Your grandma? CARTMAN: It's not really your concern. It's just that... Well, my grandma's in the hospital. She's very sick. (South Park) Is it an "it" that was omitted -- "It sure is too bad"? Is it informal style, right?.. Thank you.