The danger of the fourth test to each examinee is relative, but this relativity won't appear if there is no one around to come the danger to.
They saw this happen almost three hours into the test. Thompson was skulking through the forest trying to find shelter or a group of people to work with when he encountered a horde of beasts chasing someone.
The person had at least a thousand performance points, as seen from the cluster of light on their head with seven rings of light.
A thousand points is impressive because it means that this person has earned an average of 300 points in each of the three previous tests. This person can be said to be above average.
The target of the beasts had more points than Thompson, so they ignored him. But then a python jumped out from a tree in front of the target and bit the target before coiling around them and crushing them.
That eliminated the target with the highest priority. So the beasts turned their attention to Thompson.