Two brands (usually adjacent — same category, or same event) publicly wager something visible about their identity on the outcome of a live event. The wager has to be a bet the audience can see resolve: logo swap on social, mascot handover, product rebrand for a day. Structure: “(1) Post the challenge publicly, tagging the other brand, with a clear \”if X wins, you do Y — and vice versa\”; (2) Escalate with running content in the days between the challenge and the event (cheeky asides, tiny in-person moments, community responses); (3) Cross-brand meet-up moment — the two social teams shaking hands, exchanging the \”prize\” (a memory stick, a physical logo, whatever); (4) Prepare both possible outcome-day posts in advance and publish immediately when the event resolves; (5) Community-manage aggressively — the comments section is where the campaign actually lives; (6) Optional: convert the moment into a limited promotion tied to the outcome.” Length norm: A multi-day arc, not a single post — expect 5–10 posts across a week. Visuals stay light and mobile-shot. The whole thing should feel like two people at the two brands having fun, not a coordinated campaign.