Boarding (gameplay mechanic)
From Halopedia, the Halo wiki
Template:Realworld Boarding a vehicle is a technique featured in Halo 2 and Halo 3. It is a unique and interesting way of removing the threat of an enemy vehicle while not destroying it so that the player may use it as their own.
Summary
Boarding a vehicle is accomplished simply by pressing X in Halo 2 and RB in Halo 3 when the player is near an enemy's vehicle. This is not easily accomplished as the player can either be run over or killed by the vehicle's gunner. However if the player succeeds he/she can instantly turn the tables on the enemy by using their ex-vehicle against them. But be warned, the enemy can do the same to you, so make sure you don't give them the opportunity.
Boarding Certain Vehicles
Ghost/Banshee
When a player successfully boards a Banshee or Ghost an animation will take place showing their character model jump on top of the enemy vehicle and eject the current driver. Then the player's character will enter the vehicle and the player will now be the driver.
