I watched it happen.
I was in my car, in Federal Way, and just happened to look up as it was climbing out of Sea-Tac. I typically do not watch aircraft but I gave this one a second look because it appeared to have the raked wing-tips which I have never seen on a 777. About 5 seconds later the #1 engine began to shoot flames and black smoke.
I too was pretty amazed at how loud it was.