Corrected entry: When Jeff was hit with arrows, he was still alive, the old man approaches to shoot him so he got near the ruins, during the whole movie he wouldn't dare get close of these ruins, did he forget the risk?
Corrected entry: In the scene where Amy and Stacy go down into the pit with the torches, they are chased out by the plants. While they are down there, Amy is wearing her glasses, but by the time they get back up, her glasses are gone meaning she had to have lost them in the pit. A couple of scenes later, Amy is wearing her glasses again which would be impossible to do if they are still down the pit.
Correction: It's hardly uncommon for those who wear glasses to carry a spare set when travelling.
Correction: As long as he doesn't touch the vines, he was safe. He was only afraid of coming in contact with the vines. If he was careful, he had nothing to worry about.
SAZOO1975