Mashable‘s collaboration with Sesame Street continues. 

The popular technology and Internet culture website last went viral presenting five science experiments with Sesame Street’s blue monster Grover. 

Now, they have enlisted Oscar The Grouch and The Official Grumpy Cat to star in this latest video to duel over who’s the most depressed and gloomy.  

The clip is quickly going viral, and is already featured on LaughingSquid, TastefullyOffensive, and Mashable.