Page 5's TL note:
@Scheibkerl For what it's worth, I think that saying "ehhh, I don't know about that." would've been perfectly fine there. "When did we become friends? I don't know about that..." (not "I don't know" literally, as in that's something he's ignorant of, but instead it's more "I don't think what you just said was accurate...")
If you could pass that along to your TL, I'd appreciate it!
(Also... last page, it's "throbbing" with two b's, not "throbing")