Straya, you’ve done it again.

Julie Birrell awoke to find a 40-kilogram, five-metre-long python in her bedroom while staying with a friend in Mission Beach, south of Cairns.

Incredibly, the massive snake slithered along the verandah, then up the lounge room wall (where it flicked the light switch on), then into a bedroom (where it knocked over a lamp).

Julie raised the alarm when she woke up, which is actually pretty impressive — if it had been us in that room, we probably would’ve been too scared to scream.

The home owner, Trina Hibberd, filmed the snake sprawled across her home and posted the video to Facebook.

“We’ve got a visitor, and it’s f***ing huge,” she says in the footage. “It is massive. Oh god.”

They then somehow trapped it in the guest bedroom and called the snake catcher.

But here’s the twist — Trina says that the snake, affectionately known as Monty, had been living in the walls and ceiling of her home for more than a decade.

“We knew the snake was there but I had never seen it inside, not that I know of,” she told ABC News. “I’ve never seen it in its full length.”

The snake catcher has since released Monty into a local water treatment plant, which backs onto native bushland.

The water treatment plant currently has a rodent problem. We suspect that won’t last for long.

What’s the scariest thing you’ve ever found in your house? Share your horror stories in the comments below!