Things have moved on since 1977 when Spielberg got the world in a tiz over close encounters of the third kind. These days we can go all the way up to five:
First kind: A sighting of one or more unidentified flying objects
Second kind: An observation of physical evidence of extra-terrestrial visitation
Third kind: An observation of one or more occupants associated with one or more crafts
Fourth kind: A human is abducted by a UFO
Fifth kind: Encounters that are joint, bilateral contact events produced through the conscious, voluntary and proactive human-initiated or cooperative communication with ETI.
Don't you love Wikipedia?
Sadly, despite a flurry of crop circles and that time Cartman was anally probed we're usually treated to first base only. Those damn teasing aliens just won't go all the way no matter how much we want them to. Worse still they don't even recognise the authority of the British Transport Police:
A DATABASE of UFO sightings by police officers has clocked up more than 200 cases in five years. Launched by Detective Constable Gary Heseltine, of the British Transport Police (BTP), the unofficial site has seen around 100 officers added each year to date.
No real information on how one would go about arresting an alien or even on what charge. Once Ken gets wind of all the activity up there though, expect the roof of the congestion charge to be raised some 50,000 feet.
Oh, and you can see some UFOs caught on video over Archway here, courtesy of the Islington Gazette.