This is the stuff of nightmares for every person with even the slightest of snake phobias.
But a thrilling chase scene in a new documentary from revered British naturalist Sir David Attenborough has been declared by social media as better than any James Bond action sequence.
At 90, Sir David has delivered a scene that has simultaneously thrilled and terrified social media users, in his long-awaited follow-up to the popular series Planet Earth.
More than nine million Britons tuned in to watch Planet Earth II when it aired on the BBC on Sunday night, but one scene in particular has captivated social media users. Filmed on the Galápagos Islands, it shows a hatchling iguana fleeing for its life from, first one, then an entire army of racer snakes.
The two minute sequence begins with a single hatchling iguana being chased by one racer snake on the desolate Fernandina Island.
In a sequence of slow motion and close-up shots, the thrilling scene unfolds as the iguana stops and the slithering serpent slowly encroaches.
10 years ago Planet Earth changed our view of the world. Now we take you closer than ever before. This is life in all its wonder. This is Planet Earth II.
Please check local listings for specific information.