One problem with returning to old, disturbing memories is that there’s nothing that can be done to change the
outcome of those memories. Kien and the truck driver are thus forced to relive past traumas as they return to the Jungle of Screaming Souls, finding themselves unable to do anything but rehash the terrible things that happened in the area. This approach to memory is worth noting, as the novel later suggests that it’s possible to return to
happy memories as a way of recapturing joy.