The hunters were amazed by what they had just heard: a zombie speaking — not just mumbling a few words here or there, but one that was able to speak a whole sentence.
Never had the hunters come across this, nor had they heard reports of this before, which made them think they had just discovered something amazing. In doing so, Cleve's first thought was that they had to keep this person alive.
This was what Skittle was going for. Even if the Zombie Hunters had met a few Reborn Zombies before, he was counting on them not informing the rest of the group.
It was normal for humans to be curious in this situation, so hearing a zombie speak would cause them to hesitate, and in turn, he could defeat them and escape.
The only thing was, their powers were more than he had expected, and there was a person in the group who remembered him very well.