Possible Clues:

• "Here we go again" feeling
• Glitch in the matrix, I bet
• 'It's ___ all over again'
• Outsiders to decolonise Java and Vanuatu, strangely familiar phenomenon
• Disc jockey taking Ecstasy, a very upper-class thing we've seen before
• Sense of history repeating
• 'Been there, done that' feeling
• Disc jockey conceals ecstasy upsetting Virginia University and it might have happened before
• Feeling one's experienced a thing before
• "This feels familiar" feeling