Think of it this way: A meteorologist's job is equivalent to guessing when a flashmob is going to break out.

CNN: Can you trust the weatherman?

Footage of a festive flashmob in Birmingham attracted more than 5, 000 views in the first 24 hours after it was posted online.

BBC: Christmas flashmob for Birmingham Children's Hospital

Facebook shot a flashmob-style one.

FORBES: A Meme-Based Ad Can Make A Brand Seem Cool Or Cost It Dearly

Perhaps even a flashmob?

BBC: Geocaching Travel 101