There is always someone responsible. If it's private land, there is an owner of the land. If it's public land, then at the very least the county or city is responsible.
I think what you're trying to say and left off is "outside of the person who had the event occur with them"
And in that case, no quite often state laws will absolve responsibility from any potential stakeholders. Agricultural liability laws in many midwestern states are an example of that.
Eventually the person would be made whole somehow, and the responsible person would be found.