This movie has too many plot contrivances.
Why didn't the archaeologist bring a satellite phone to the ruins that had no cell service?
Why did the college students trust a random stranger to take them to an uncharted area?
Why didn't they plan for the way back?
Why did the German guy assume his archaeologist brother was safe when he didn't come back at the expected time?
Why didn't they just burn the vines?
Why didn't they toss vine pieces at the villagers from the top of the pyramid to create a diversion?