This was a night “bath” given to a PGA plane as a tribute to the captain, who was making it's last flight (on the return to Lisbon) before retirement.
Usually you get to see these “baths” during day, this was the only one I've seen during the night.
Full report on my blog:
http://planesandstuff.blogspot.com/2009/10/remembering-night-bath.html [planesandstuff.blogspot.com]
Esta demais :))! bem apanhado!