Unsuspecting commuters using a short cut through a tunnel in London Bridge got a shock earlier this week when confronted with dinosaurs and cyborgs courtesy of Pepsi Max for the latest instalment of its “Unbelievable” campaign.

It has received over 1,500,000 Plays on YouTube and more than 500,000 on Facebook in 3 days. The video featuring the images appearing and some of the reactions they provoked can be viewed above.

Idea and execution by AMV BBDO and HSI/Grand Visual. The Unbelievable Channel, launched in February to be updated weekly with videos of people doing unbelievable things, is part of the brand’s “Live for Now” strategy.