Imagine being so hungry you get ready to rip open your Gingerbread House (that's in a box) only to discover it's not Santa or reindeer "living" inside the box, but something actually alive instead.

Well that's what happened to one mum over in Sydney.

Katie Gompertz (is her name) and she was feeling peckish, so without her kids noticing, she tried to sneak in an evening snack Monday night, only to find a giant spider stuck inside the box with an egg sack.

After posting the pictures online, a member of Woolworths’ contacted her and promised to replace the gingerbread treat.

Thing is, Katie reckons she is too scared to put it back in her car and drive to Woolies, because it's huge!

So they said they will come and get it off her and give her a new Gingerbread House (minus the spider).

Some of the responses on Facebook have been hilarious:

Jul Smith-  she has an egg sac as well. You're going to be a grandma 

Katie Gompertz

Mariko Smith - I say go back to just eating Quality Street, 

Katie