Halo: Combat EvolvedEdit
When a player is shot with Plasma Weaponry, done better with the Plasma Rifle, or the mounted gun on a Ghost, it will be harder for the player to turn or move at normal speed. An example of this is when a Ghost strafes around a Scorpion while shooting at it, the main cannon will not turn fast enough to get a lock on the Ghost. If the Ghost were not shooting at the Scorpion, the player could easily destroy it.
In Halo 3, when the player's is hijacked, their look-speed is slowed significantly for a few seconds making it harder for them to defend themselves, same thing in person.
A charged Plasma Pistol can also stun a player or the vehicle they are driving for a few moments, leaving them vulnerable to hijacking.