The internet does love a good optical illusion.
This time around a photo has gone viral on social media because people cannot see the fourth person in the picture.
The debate started when @JenMsft tweeted the image of four bottles being clinked on what looks to be a group hike.
But only three arms are immediately visible.
She commented: “My brain refuses to believe there are 4 people in this photo.”
For those struggling to see them all, the “missing” fourth arm appears to be camouflaged as the bottle-holder’s jacket matches the rocky path the group are standing on.
The post has already been liked more than 165,000 times on Twitter.
@JenMsft said the photo was first shared in a Reddit thread on confusing perspectives.
Social media users reacted to the latest confusing picture to go viral.
Someone handily zoomed-in on the photo to highlight the illusion.
Others shared their favourite optical illusions.
Can you see them?