Chase fell off the roof and lost his memory while hiding Mr. Solway’s medal and trying to harvest material with which he could cyberbully his neighbor. This revelation suggests that, according to the novel’s internal logic, Chase lost his memories and identity as comeuppance for stealing Mr. Solway’s “identity” (that is, the medal symbolizing his good reputation) and bullying. It is only by taking responsibility and making amends—returning the medal to its rightful owner—that Chase can start becoming the better person he has realized he wants to be.