Utterly Mad

"Woah..." he mutters. That was surprising, but he did not saw it as horrible or scary. It was strange, otherwordly, and it felt good, in a weird way.

But he has to continue, maybe they drugged him to get him to sleep before bringing him there, and those were just allucinations of the drug. Yes, that is. "Let's go".
First he'll peek to all sides, in case if there is anything, and then slowly, carefully walk up to the syringe, and take it, just in case.
He takes one of the rocks, and uses it to mark in the big boulder the direction where he thinks the center is, and the other one where he thinks the lake is.

((I'm undecided here, Jakers, could you roll a desicion for me here? If not it's ok, just tell me and i edit. Like, if it's X i advance towards the lake, and if it's Y i try to come back to the clear in the center of the world)) It's hard to decide, either to continue exploring that lake or go back and report. Whatever he decides, he will do. Also, any path he will take, he will start marking trees with the rock to know the path.