so I click on this BBC link about 20 years of UFO reports being made public today

http://news.bbc.co.uk/2/hi/uk_news/8520486.stm

and that picture there is EXACTLY like the one drawn for me by a friend of my gf who regaled a long story of how her and her father sat transfixed on their veranda one summer's day in the early 90s while this thing appeared and hovered there for 10 or 12 minutes

rational explanations please

other comments on the article and UFO phenomena in general also welcome