A snake.

Because I'm Australian and grew up in the country, I was taught how to take them down with a sharpened shovel when I was five. Coincidentally, I got my first one a few months later in the garage when it rushed out of a tarpaulin toward me and I shoveled the head off, just like mum taught me. Common brown too (a.k.a Eastern Brown, but they're everywhere. One of the most venomous snakes in the world).

My next one was a red-belly black snake that rushed out of a log. I used a mallet to crush the head and was 6. Also one of the venomous snakes in the world. We have most of them here.

Always go straight for the head with distance and speed.

It may sound cruel to not try scare them into an area and call someone for removal, but they're just too dangerous. And if it's there, it's made territory there, so if you lose it it will definitely show up again. Most are aggressive, so you need to take the chance when you've got it because it's simply more dangerous not to and come off second best next time.

It's also common to deal with pythons, getting one sunbaking off the road or out of the house if it overstepped it's boundaries. We like those ones though and definitely don't hurt them, especially if they make home in the roof or under the house. They keep the possums and mice away, therefore the venomous ground snakes away. Roof python is snek bro and a very welcome guest. It's sad when you notice one's probably moved out :(