I've had an aggressive red belly black, but usually not as aggressive.

Re browns being aggressive, usually in my encounters with them, they flee pretty quickly too. Several years in a row, while doing Summer fungicide spraying and filling the sprayer tank, sitting in the shade of a tree while the tank fills, have had a brown slide out from a tank or pile of posts to within a couple of metres of me, when they realise I was there, an immediate turn and back the way they came from. Just as well, as my immediate thought it where is the closest long handled shovel or shotgun. Don't like them near the house of sheds at all. One found in the front garden, was seen a minute later a hundred metres away getting away. I was still looking for it in the front garden at the time. Had a brown as a "pet" for a while. The dog found it on the back verandah behind some furniture. Was only a young one about 8 or so inches long. In the end decided it was silly to keep as if it got out of the aquarium and someone was bitten, it wouldn't feel good. Last one seen this summer was a full size one trying to get into the truck shed.

The only times I have seen them strike was on my first GSP dog, when he was struck a couple of times on the shoulder. I was about 50 metres away. The snake must have been at full distance and never got his fangs in, as the dog wasn't harmed. The snake lost its head to a 12 gauge blast however. My current GSP survived a brown encounter too, cleaning up a pile of railway sleepers with the frontend loader, a brown fell out. Shot it in the back with a .22 Magnum, the dog came running to see what the fun was, yelled to stop, he kept coming, but ended up stopping right over the top of the snake ... it is amazing how far you can throw a dog by grasping it by its skin and giving it a toss ...

We have a couple of snake laboratorities nearby, one which deals with anti venom production for a lot of snakes from around the world and the other I forget but never knew it existed.