REDDIT users have been testing themselves to see if they have the eyes of a hawk by trying to spot a deadly snake hiding among the leaves on this forest floor in a photo.
It shows an innocuous forest floor covered in dried leaves, sticks and bits of green plants but among it hides a lethal serpent - can you see it?
"The reason why you need to watch every step you take when out in the woods," the post's author captioned the photo.
The image left users scratching their heads.
"Based on this, watching your step seems futile. Unless I want to spend my whole afternoon taking a very safe 50ft hike," one person wrote.
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"Gotta use your walking sticks like the blind use canes," quipped a second.
"This is why I wear closed toed shoes," said another.
"You have to sprint and scream as loud as you can while in the woods. This will scare pretty much everything away," wrote a third.
Look a little closer and you'll spot an S shape on the left of the yellow-green leaf in the middle.
The venomous Copperhead snake has light brown triangles and is completely camouflaged with the foliage.
If you want another challenge, this mind-bending optical illusion has spooked viewers into thinking cars are rolling UPHILL.
Bizarre footage appears to show motors defying gravity as they roll up a slope in South Ayrshire, Scotland.
And if you want to test your eyesight, see if you can spot the dog hiding in this woodland scene.
Man's best friend is at it again with the baffling optical illusion where Teddy the pooch is hiding somewhere.
For more animal puzzles, see if you can spot the cat hiding plain sight near this red fence.
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