On the second cinematic where that big Hylek becomes empowered, you find yourself being on that cannon, destroying the poison blobs. When the cinematic ends, it forces you to leave, but the camera stays there.
In the end, I had to do the battle from quite a distant (and obstructed) view.
http://i219.photobucket.com/albums/cc209/Aposthebest/gw002.jpg
I placed the healing seed so that you get an idea where my characters is exactly.
