This adorable subway dog is going viral — but where are its legs?

A video of a dog riding on the New York City subway is charming and bewildering thousands of social media users. The clip, shared to Reddit’s r/aww forum by user u/unaviable, shows the head of a seemingly large dog sticking out of a suitcase. The post, which shows the animal riding the train next to what appears to be its owner, was upvoted nearly 25,000 times in its first day online. But there’s one thing question that seemed to be on the mind of several Reddit users: Where is the rest of the dog’s body?. The confusion seemed to stem from the fact that the dog’s head doesn’t seem to correspond to a body that could fit inside a small suitcase. However, many users were quick to point out that different breeds of dogs have different head sizes. Others offered different theories, such as the idea that the video could be a sort of optical illusion. Regardless of the mystery, the majority of users just seemed enthralled by the dog’s cuteness