Reply #77: It's from Monty Python

[zytime]

and the holy grail. The knights searching for the grail come across the knights that say "NI" who give them a choice between death, or getting them a shrubbery. They go into town and find Roger the shrubber, a maker and arranger of shrubberies. They bring back the shrubbery, avoid death and go on their way, even after they are told they now have to cut down the largest tree in the forest with a herring.

Consider yourselves enlightened...or mourn the two minutes of your life that you will never get back because you bothered to read the explanation:)