VIDEOS:
Liquid Tiberium chain reaction
The GDI Ion cannon is normally a rather local WMD, but when it hits a cache of liquid Tiberium, it triggers a chain reaction that leaves the world forever changed.
Example of:
World-Wrecking Wave
The Scrin harvesting fleets
Example of:
Alien Invasion
Surprise! Alien invasion!
Example of:
Outside-Context Problem
Aliens get caught up to speed.
Example of:
Aliens Steal Cable