This goes back quite a while to a day when I was at Paine Field for some 777X activities.  After all that I had been there for was done, I was getting ready to pack up and go when I saw something off to the east approaching the field.  It was large but seemed rather slow.  It turned out to be a C-17.  It made a pass straight across the field and I was hoping that they would break into the pattern but I was to be disappointed.  They turned to the south and headed off towards McChord.  Still, it was a nice addition to a sunny day of aviation photography.