The answer is clearly that she strings up the jump rope between the trees, then starts to wave the . . . Snuggie . . . vigorously to catch its attention, before running to a safe distance. The hippo swoops down to get her, but is caught on the rope and keels forward! Then the girl uses the condom and the fountain pen together -- as a condompault, perhaps -- and twats the hippo right in the eye with it. Then all she's got to do is back off, as with a large animal and a pile of trees, in my experience eventually it's going to run into one face first. It'll shove the fountain pen into its brain, killing it instantly. And that's that.