Originally Posted by
TheWombatOfDoom
I'd go with that since it's in a speech bubble, treat it as a normal one despite it being a kind of sound effect. Sound effects are limited to the pop! CLINK! and so on that don't have bubbles.
For typos, I'm not sure what [sic] is, but I assume it's designating a correction? If so, that sounds like a good idea...but I could also see that to prevent arguement, leaving the text as it is shown. If it is corrected in the books, then we should probably go with the correction.