He'll pick up the key and chew on the aloe leaves as he walks for some moisture. What kind of a key is it? Does it look old or new, handmade or modern?

He'll cross the river and continue eastward, perhaps accidentally drawing close to III.J.25. He will watch his step once in the jungle, and seeing as he has no weapon now, try to look for some straight, sturdy stick he could tie a knife to for a makeshift spear.