I was tower ATCO at Dubai in the mid eighties on a typically sleepy afternoon shift, when I almost fell off my seat as I noticed a MEA 707 on short final with a squad of painters on the runway.
I couldn't send it around because it wasn't on my frequency and we were not even expecting an arrival for another hour!
A quick call to radar revealed that he had cleared the 707 for a visual approach to runway 30 at Sharjah, had transferred the aircraft to Sharjah tower and had gone back to reading his book. Meanwhile the Sharjah controller had cleared the errant pilot to land and was wondering why he could not see the aircraft.
Fortunately the radar controller alerted the Sharjah controller who instructed the MEA pilot to go-around from my runway as the painters were running for their lives!
Happy days!