The Ecuadorian embassy in London is based in the lavish Knightsbridge, London. The embassy is, however, only the size of a large apartment on the ground floor of the building. The rest of the building is made up of apartments and other embassies, such as Colombia.

And that's it. It ultimately has four walls and a door. Even the front door and the hallway -- not to mention the all-important elevator -- is still considered U.K. soil.

For all intents and purposes, that is a little slither of Ecuadorian soil in the United Kingdom, and U.K. authorities cannot go inside unless it asks the ambassador kindly and she agrees, or revokes the diplomatic status of the embassy citing U.K. law. Both are unlikely, but entirely possible.

For Julian Assange to leave the Ecuadorian embassy without being arrested would require skill, luck, and sheer hard work and diplomacy. Or it may include a helicopter. Here are his options.