Lila, originally from France, put a chair in the goanna's path to try to keep it from customers while she decided what to do wit h the critter.
"I was just like a kid; I thought 'I want to do it, I want to do it, I know it's bad, but it was getting close to customers'," she said.
"I wasn't scared, I like reptiles so was a bit excited."
Lila then grabed the goanna by its tail to drag it outside before it could scare customers further.
A video of the incident was uploaded to the Mimosa Wines Facebook page on Sunday and by Monday night it had been shared over 330 times and had 23,000 views.