During these calls, Lunchbox is obviously kidding and isn't telling them about their wild animals escaping. Instead, he's telling them that their squirrels, butterflies, and spiders got out to see what their reactions would be. All of the zoo employees except one gave a little laugh at Lunchbox and explained to him that those aren't their animals. One of the employees caught on to Lunchbox's antics and told hims she'd "be right out" full well knowing she wasn't coming out.
If you need a good smile or laugh today, this is guaranteed to do the trick.