Jensen panics during filming

[vashep.livejournal.com]

First time posting, hope I did this right. Looking for a fic from quite a while ago. All I remember was that Jensen was filming a scene where he was restricted in some way. I think he was in a box(coffin). Jared is supposed to break in to save Dean but there is a malfunction and Jensen can't get out. Jared tries to keep him calm but Jensen is really not coping well. Anyone remember this one? Would love recs for other panicked boys too. J2 only please.