I was working with my current trainee on ground control the other morning when this happened. We had just been discussing how he should be making "Plan B" at the same time he's making "Plan A" so that if Plan A doesn't work out he'll already know what he's going to do next.*
This B777 was stuck in the position shown here for about ten minutes, completely blocking the intersection of C and C-9. At certain times of day, something like this can really throw a wrench into the operation. Fortunately, this was not one of those times.
This close-up was taken a few minutes prior to the opening shot, and gives a better view of what's happened. Hint 1: The tug was towing the airplane along that curving yellow lead-in line in the lower left corner of the photo. Hint 2: Anytime that many guys are all gathered around looking at something, it can't be good. Hint 3: The airplane is normally supposed to be behind the tug. Hint 4: Look at the angle of the airplane's nosewheel.
* ATC101: This is a standard practice among controllers; it's what we do. You evaluate the situation and make a plan for how to resolve it. While making Plan A, you're also making Plan B so that you don't have to think about what to do next if Plan A doesn't work out. While making Plans A & B, you should also have a good idea of what Plan C may need to be, and at least an inkling of what Plan D might be. More simply stated: Always have an "out" (aka "exit strategy" or "escape hatch")