Try to calm it.

You slowly raise up, and extend your hand. You make soothing noises and calming remarks as you slowly approach. It lowers itself and begins to growl at you, you stop dead and make more calming sounds, this was starting to seem like another bad choice. If this beast was hungry you were going to be its prey reguardless of your actual thoughts or wants on the matter. You started a much slower approach, hushing the wild beast, trying to calm it in some form or another. Oddly this seems to work as the giant wolf stopped it's growling, however it did not move from its ready to pounce stance.

You keep calm focusing on the task of not getting eaten. Your pace is slow but soon your not but a foot away, the wolf has lessened its attack posture, but it doesnt seem to friendly. The inches melt away and finally you pet its head, its tounge rolls out and its tail begins to wag. The way it was acting almost made you believe it was maybe a pet. "Your a good boy" you say petting him.