Swamped

You decide to follow Starling. Since your appearance might startle her, you decide to sneak up behind her and cover her mouth to keep her from calling out.

Of course, she's gone into the water, which isn't really your element. You decide to try following her movements from the trees, and wait for her to surface, then make your move when the time is right.

The plan hits a snag when you notice that the beast is swimming this way, quite fast. You're not sure if Starling's noticed it, but considering she's your only lead on getting out of this swamp, you'd prefer not to take chances.

So how in the hell are you going to scare off a rampaging swamp beast? Or at least alert Starling to it?