"
Meanwhile I'll report back to my colleagues who are chewing on the doors
Bob is going to go back to the other zombies who are chewing on the door so that he can tell them that trying to get tom is pointless. Tom is obviously not interested in losing his brain today and Bob now understands that. Now Bob is going to make sure the other zombies understand too so that they don't waste their time trying to get Tom that wont budge because it is pointless.