Let's bear in mind that Australians call their best friends Good Cunts, and try to take it the best possible way :D I don't even disagree with him, it's just to

Let's bear in mind that Australians call their best friends Good Cunts, and try to take it the best possible way :D I don't even disagree with him, it's just too easy to do better. The friction/damping term you've added is absolutely necessary to counteract the systematic energy gain from Euler integration, and with better integration, you need less / no unphysical damping, leading to more of that delicious chaotic behaviour we're all looking for. You can even cheese this with infinite amount of computation if you wanted to do it braindead style (which is still super instructive!), by just repeating the step function with a scaled-down dt until the position components agree to within some tolerance. The rest is an incredibly deep rabbithole, which I've been enjoying since decades :D