Oh this is the episode with the elevator! I tell you, G'Kar laughing at their mutual impending doom- this is exactly the kind of thing why B5 still gets to me.
"Can anyone here me?!"
"I hear you"
Brlliantly played by Katsulas, the way he just laughs at Londo's escape plan as if it surviving would be the silliest thing in the world.
And, uh, oh yeah, some other stuff happens I guess...
...plus that poor guy between them, waiting for the elevator.