His jungle hike turned out to be much less hectic and exhilarating than Jake had envisioned at first. In addition to not encountering a single monster, the air was humid and warm and the flora was so dense that he felt like he was wearing earplugs.
The field of birds that he could hear easily from outside the jungle were almost muffled once inside, as if a thick wall of leaves separated him from the tall branches where those singing birds were perched.
Each step forward was a real hassle, forcing him to contort himself back and forth to avoid rubbing against brambles and bushes. The T-Rex and its charcoal-colored predator obviously had skin thick enough that they didn't need to worry about it.