Wild DYKWIA spotted at Dulles in the "lines are for everyone else" category.
1K checkin was line was abnormally long for my recent Saturday experiences (though with a good agent at the front of the line policing entry).
Guy blurred on Red below was probably 8-10 people behind us in line and then just suddenly appeared hovering behind the kiosks (this picture taken when I was #2 in line). Per Ms. LincolnJKC apparently he grew impatient with the speed of this line, got in the other (bag drop?) line and then after a couple minutes limboed under the tensabarrier and appeared on the position seen below.
As a reminder... 1K status (if even possessed, the yellow handle wrap makes me suspicious) allows access to a priority queue. It does not mean that you can just skip the queue entirely -- especially when that is a queue of your peers..