Something unusual

During a restless hike in the woods, the class were all desperate to eat something. Their hands poised over their delectable lunch and didn't notice the big sculptor that looked like legs expect William. He was not dumb and ate something before the trip and was astonished to find the unidentified object. As he observed closer, he found out it grew out of a new born tree. I goggled back to the path, the class has disappeared and were nowhere to be found. A sudden rustle came from the tree. Then again and again. Until it pounced ontop of me.