Altering Future History with Hoverboard Incident A hoverboard incident alters future history, preventing a robbery and changing the course of events. The success is evident as Marty realizes the impact on history has been altered.
Consequences of Meeting Future Self The consequences of encountering one's future self are discussed, highlighting potential outcomes like passing out or creating a time paradox that could destroy the universe. Doc emphasizes using the time machine for travel rather than personal gain.