Who is he?
As platoons of Imperial stormtroopers pursue our heroes around the first Death Star in A New Hope, one particularly inelegant footsoldier manages to give himself a mighty good crack on the noggin with a partially-descended blast door.
Why do we love him?
Because we always root for the underdog. And also because imperfection is something to be treasured, particularly in these times of CGI-up-the-wazoo blockbusters (see the deeply unfunny pratfalling battle droids in The Phantom Menace for proof).
Key line: ‘Ow!’