For me, it's a case of "been there, done that." I've needed help a few times and bystanders have always come to my aid, for which I am hugely grateful. So, having been benefitted by the kindness of strangers, I instinctively feel an obligation to assist others when presented with the occasion.
However, I try also to be aware of my limitations and recognize that having an older and out-of-shape man come to the rescue can sometimes only serve to increase the casualty count. So, some cautious reserve is warranted.
However, I would always stop to at least add moral support and summon more able assistance as needed.
Glad you're ok, and may I say, "Bad dog!" Glad she's ok, too.