...that the so-called "Stupid Cop" is a vigilante police officer?
...that a slipspace explosion sent a UNSC AI from the year 2552 to the year 2004?
...that slipstream space translations for a Phoenix-class colony ship require 4.3 quadrillion (4.3 * 1015) calculations of the quantum field per second?
...that a Flamethrower was intended to be put into the first two Halo games, but for balance reasons wasn't included in campaign until Halo 3?