Nostalrius Begins - Quality wow vanilla realm (1.12)

Last night i started up a flight to lakeshire from stormwind and alt + F4 and got off my computer, the next day I logged back on and I was at lakeshire, but I was still on the gryphon and went in a straight line back to stormwind, disregarding any mountains and trees and once I got to Stormwind, I was sent back to Lakeshire

This is likely due to how the server saves information about your character. Always try to properly log your character out to avoid conflicts of data like this in the future.