Yeah you're right Ken!
As no one else is looking at this 8) I'll tell you what happened next.
I was taking some shots of the 777 over the advertising hoardings I've been working on at the 13 threshold to see how they compare to the real thing.
Then I put the plane ready for takeoff by slewing so the Goony didn't bother with it as it had already been cleared for takeoff.
Taxied up, turned, went right through the 777 and took off!
But it's a great AI - I love watching it takeoff and land. Totally different from all the other planes.
Roger