He was running, there wasn't any car to keep him protected now, all he had was his feet and how fast they could carry him to safety. He passed many big trees and he could have tried to climb up them but the minutes it would take for him to at least climb halfway through could cost him his life, these wolves could easily reach 10 feet up if they simply stood on their hind legs.
Ender prayed and prayed and prayed for some way to escape this hell. The snarls grew closer and he made the mistake of looking back, causing him to lose his footing and stumble down to the cold ground. His heart rammed in his chest as the wolves came into view, they didn't outright attack him but rather began circling him, taking their sweet time to finish him off.