Photo ops with Jensen and Jared at AHBL8. The people who got the Sam and Dean puppets have an op. There are a couple more sandwich hugs on the video posted by The Hubsteria people who are running AHBL. 

Jared and Jensen demonstrate a slow motion fight scene that includes some slapping and the potential for slo mo pants ripping. Apparently Jensen ripped his pants when he and Jared were getting into the car before this con. (X,X)

Gabriel Tigerman about Jared and Jensen pranks (NashCon 2012). Gabe was only in season 2 so I’m guessing this was before they decided pranking each other was dangerous. And his last episode was All Hell Breaks Loose, part 1 where Sam actually dies at the end and it was really hard on Jensen. I can totally see Jared pulling pranks to distract him.