And like how we've learned that people getting attacked by a vampire may make the sound "URK", apparently after being thrown to the ground, people may make the sound "OOOOF!" Or at least we know for sure that in Willie's case, he does.
And on this page apparently we learned that when someone gets punched in the face, they make the sound "UNNNGHH!"
I seem to recall Campiti saying in at least one of the ShadowGram interviews that they planned to start to work what the show had planned for Season 2 into the comic once they began Book 5, Issue 1. Though, of course, they never got anywhere near that far into the comic...