Almost 30 years ago I flew to China, friend of mine was studying in Beijing, landed, got to his "place", the next thing I remember properly is stepping off the plane back in my country, 5 days later.
Those 4-5 days are to this day a complete haze, I managed to recover some memories, taking some local drug, meeting with some punks and going to a punk concert/rave, but neither of us has a complete recollection of those days.
When you are young crazier things can happen.