To answer the OP's question, yes. I just ate a 27525 Kill Shot in WvW. We were both mounted in my territory, nobody else for miles, so I can't see how he would've been buffed to the moon. He was following and hit me with Lance for 166 so I figured ok he wants to fight. I dismounted and managed to get in a Judge's Intervention to close the gap for minimal damage (440), and then bam downed before I could do anything else. (He followed up with an 8k Brutal Shot and a 15k Final Thrust after I was down. I got in a few burning ticks that totally didn't matter.) Maybe I played it wrong, sure. I'm not the best by a long shot, but I expected a longer fight than that. I was running Marauder's and had a bit more than 20k health, and as far as I know there isn't a viable toughness build for guardians at the moment. Sometimes I run Valkyrie and that wouldn't have made any difference to the outcome. Would appreciate knowing what I could've done differently other than just high-tailing it out of there.