Guild Wars 2

HI everybody!
Im just wondering what hit me in this clip. i looked threw the damage log and nothing shows anykind of damage thats more then 2k, but a 5k chunk of my hp just goes kapoot. any kind of help will really help me understand what is going on in combat.

http://plays.tv/video/5853544a9873302a34/gw2-wtf-hit-me-?from=user

thank youuuu!

the cat.

mjau.

mm think so?

if so why does a ranger tank/mending/cavalier amulet class get to have the ability/option to do 5k+ damage, when no other class has that. seems like pet damage is still broken for the better part of a year and they just dont know how to fix it. they are straight up screwing over other classes when they dont think and fix the broken crumbs. i can show you the entire fight i had with that druid he just 1s then switches to pet then 1s again, just leaving i guess his pet to do 90% of the damage. if a class can just press 1 then f4 then f3 with out any way of telling what is about to hit me theres not point in investing time into this game.