Old TV Episode or Movie

The past few days I have been trying to remember an old tv episode or tv movie, with little success.  It was nominally a horror, but I don't think it was all that scary.  It was set inside a cafe or diner, late at night.  There were a bunch of people there, I think they were strangers.  Someone left and was shot.  At that instant, time froze outside the cafe.  The rest of the show dealt with the people still inside the cafe.  That's all I remember of the plot.  I thought it was Night Gallery or a show like that, but I can't find this particular episode in the episode list.  Whatever it was, I'd really like to see it again if someone recognizes the description and can point me to the show.