Even babies that were just born yesterday know that dogs are man’s best friend. But after watching this clip, we firmly believe that a dog is also dog’s best friend, proving that, even though they have no way of expressing it verbally so that we might understand, dogs still worry and know how to express it.

In one viral Twitter post, we see a Boxer named Archie stand above Jack, his brother by conviction, as he lay with his back on the floor. Why? Because Jack is the older brother and, according to Sam, the two brothers’ owner, he has learned how to tick his baby brother off – by playing dead, and very convincingly at that.

In fact, Jack’s act of playing dead is so successful, that big pup Archie doesn’t know how to cope with this situation, seeing his pal lying seemingly lifeless on the floor. So he does what he knows best, yelping, barking and crying in distress, while naughty Jack sprawls on the floor of the pub they call home, all fours in the air

The video has been retweeted more than 13,000 times and was even featured on Reddit, where Redditors expressed their concern if the dog really is OK. He is that good!