Tessio's final scene is the finest scene in the trilogy, and its encapsulated by one moment. When Tom says 'I can't go either Sal' and the other guys surround him...Tessio looks Tom DEAD in the eye for about 10 seconds. That moment of acting supremecy by Vigoda spoke absolute volumes in the space of a few moments. In that span of time Tessio realizes he has been found out, that everyone around him knows...and that he is going to die...all that in just one look...absolute genius!