I've never tried this as a forum game before, but lets see how it works out:
Monty Python's Flying Circus.
In this, we all must put together "sketches" for Monty Python's Flying Circus. Each person takes a character in a random sketch, and they must make up their lines as they go along. Whoever decides to be a character in the sketch, its first come first serve, so just choose what character you want when you jump in.
First: The Fourth Spanish Inquisition.
Setting: An Israeli jail.
In order of appearance -
A Mossad Officer
A Palestinian militant.
Cardinal Ximenez
Cardinal Biggles
Cardinal Fang
The beginning:
Mossad Officer: Now, tell us where the militant leader is hiding, or else, I'll cut your balls off!
Militant: I didn't expect the Spanish Inquisition.
((I am Ximenez only from hereonout.))
Ximenez: NOBODY EXPECTS THE SPANISH INQUISITION!!!
((Alright, now jump on in!))