Their ongoing prank on Misha when he’s trying to film his coverage: 

1. Jared does whatever he can to make Misha crack up.
2. This causes Misha to focus on Jensen so he doesn’t laugh.
3. Jared walks off supposedly so Misha isn’t distracted by him.
3. As soon as Misha is looking right at him, Jensen takes up where Jared left off by making goofy faces. 

(X)

Not sure of the context here but it’s funny. (X)

SPOILER ALERT: Jensen just broke the news that he’ll be playing another de-aged version of Dean this season but not in the same way as last time. It probably has to do with that. It’s the episode Jensen said was challenging and funny where Dean changes suddenly.