I remember seeing some screenshot of Ulfric's "honor" duel with Torygg. I thought I'd see a flashback in Sovngarde or something, but I just cleared that, and the most I got out of Ghost!Torygg was a few barks about it and his lament for his widow's grief.

So how does one witness it? Or was I just imagining things about seeing a screenie of it?

Screenshots of it are very unlikely since Torygg is killed beforce the game starts and I can't recall any flashbacks or whatever unless set up with console commands. The only thing I know of is, like you said, the talk with him in Sovngarde.

BTW: I like your sig. It's the way I act every time I see some of them on a lonely road... xD