Speaking of panzerfausts (and Giggles' story), one time I was looking thru the scope of a sniper rifle while on sniper hill (yes, I've been there, ugh). I saw a panzer launched at me from the roof of the forward bunker; the scope being at full zoom made the rocket look like it was in slow-motion. I got away without a scratch. I just thought the whole thing looked pretty cool.
OK, on to deaths. I think my favorite (or funniest) deaths are when everything is a frenzy and suddenly you are in limbo/spec mode. No noise, no idea how you got killed or gibbed, it just happens so fast. Like everything just going blank.
The funniest kill I've seen -- I was watching a friend play a few days ago. He poisoned a flamer and the flamer bent over into his own flames. I don't think my bud got the kill because of this guy's suicide flames/sickness, but it was satisfying nonetheless.