Many years ago I had the opportunity to sit (actually lie down) beside the "boomer" on a KC-135.
We were over Southern California, and I can tell you that the view was fantastic.
As I monitored the communications, I did not know the type of aircraft that we were going to refuel because they use tactical calls sings, etc.
When the "bird" approached it started out well outside our viewing angle, and you can only imagine my surprise when at 27,000 feet at 300+ mph and looking pretty much straight down, all of a sudden a B-2 bomber slides into your field of view about 30yds away

You are looking directly into the cockpit, and could easily read the pilots name on his helmet. Literally an ungorgettable experience. I'll look in the archives and try to find some photos and scan them in.