Oh, I disagree entirely. Jenny's death was horrible. But the real tragedy was in the viewer's knowing that she's already dead. It was Giles' building hope, then gut-wrenching realisation that made it so heartbreaking. If we hadn't known, it would have been merely shocking - like, say, The Body (or, rather, the end of I Was Made to Love You). That doesn't make me sad. It's the character reactions that do it.
The phone call is also horrible for just these reasons.
And the way Giles is just so
empty afterwards -- and then Drusilla's illusion, which is almost more heartbreaking for me than the Buffy/Angel moments -- how very
hungry Giles is to believe that she is real, that she is there, that he can be happy. (The camera work on that bit gets me really badly, too. Oh Joss.)
Another episode that really makes me ache in a quiet sort of way -- "I Only Have Eyes For You". Buffy struggling with forgiveness, the poignancy of that speech being interpreted and re-interpreted by each person who delivers it.
(Also, until I started watching Buffy, I had no idea what levels of being-a-sap lay as yet untapped within myself. I do not
get weepy very easily -- but Joss Whedon can wreck me like no other person. I sniffle unashamedly every time I hear "Full of Grace". I make embarrassing squeaky noises. I
brooded after "Innocence", and after
yellow crayon and I watched "Becoming, Part II" for the first time, we stumbled downstairs, with blank, stunned looks on our faces, and when people asked us what on
earth had happened, we could only look at each other and wail. "SHE-- ANGELLLLL!" Oh, it's terrible, it is. What hath Joss wrought?)