Dallas/Fort Worth International to Seattle Tacoma following a real life route. Problem is, I established myself on an airway to do the flight, and while waiting for a clearance, I looked around outside. Low and behold, I saw two 747s flying somoene inside of each other on the same route. I dove a little to avoid them, got a little rap from ATC for descending, then got back on course and kept going.
One of the planes was Landmark and one was Cargo. I got the coordinates of the place, gonna circle it later and look for it again. Anyways, just though it was funny and see if anyone else had seen it lol.
