(I was the Kessie.)
I didn't even know that I'd been targeted until I started taking damage. He was a hell of a lot faster than me (3700 vs. 2456 m/s), and that's what killed him. He had no tank, 46 less DPS, and no tank, and he flew right up my tailpipe.
It was a no-skill kill ... and I'll take it.
And yes: his buddy killed me 10 seconds later.