That's not a difficult one either - if you pick up your hammer, walk up to your neighbour's cat and start hitting it - who's responsible for that, you or the manufacturer of the hammer?! Exactly the same scenario in your example.
That's not a difficult one either - if you pick up your hammer, walk up to your neighbour's cat and start hitting it - who's responsible for that, you or the manufacturer of the hammer?! Exactly the same scenario in your example.