Ever get the feeling that your eyes might be playing tricks on you? Like, you’re staring at something, but just can’t make sense of it? You’re definitely not alone in that.

Take a look at the image below. Believe it or not, 80% of people can’t figure out what they’re looking at when they see this for the first time.

When this image started making the rounds on social media, a lot of people flunked this simple insight test. What’s even more surprising is that they were seeing something that wasn’t even there, even though they couldn’t quite pinpoint what they were seeing.

Most people thought they were looking at Legos, but that couldn’t be more off. This photo was actually taken by a helicopter pilot in Hangzhou, Zhejiang Province, China.

What you’re really looking at is a massive fleet of retired buses parked in one place. It’s quite the sight, isn’t it? When the photo went viral, only a few people could guess correctly what it was.

So, how did you do? Take a moment to ponder this little insight test and marvel at how easily our eyes can deceive us.