It only seems to respond, by moving forward even more.
It then stops in front of you.
And begins to charge one of it's claws to destroy the platform you're on, causing you to fall into the freezing water.
You can however, notice that it doesn't seem to have a rotation mechanism.
Meaning it would take some time for it to accurately pinpoint your location, if you managed to get behind it.
Also, despite it's large size, it is rather short.
So it could be possible to leap above it.
It continues to charge.
Make your decision.