Make your moment easy to recognize.
Start with the song or conversation
The moment you both reacted to a surprise track gives someone more to recognize than “we made eye contact.” Keep the story grounded in an actual interaction.
Add the location inside the event
A named section, food area, or side of the stage can narrow it down. Avoid workplace, hotel, or home addresses.
Let a private reply do the rest
Keep phone numbers and handles off the public board. Ask a question about the conversation and wait for a reply in your inbox.