PFR

PFR, or Plasma, Frag, Rocket, is the act of throwing a Plasma Grenade, then throwing a Frag Grenade, and last shooting a rocket, consecutively at the same area of ground. You can use this to send yourself, another player, or a vehicle flying very far in either Halo: Combat Evolved and Halo 2.

Requirements

 * At least one Frag Grenade.
 * At least one Plasma Grenade.
 * A Rocket Launcher.
 * A light vehicle. (Optional)

Method (Halo:Combat Evolved and Halo 2)

 * 1) Take aim under the object you wish to launch
 * If launching a player, be sure not to aim straight down to avoid sticking yourself
 * 1) Throw a plasma, and while the throw animation is occurring, press the grenade-change button
 * 2) Tap the throw-grenade button to throw a frag as quickly as possible.
 * 3) Tap the fire button to shoot a rocket as quickly as possible.
 * If launching a player, the player should jump at about the same time as firing the rocket.
 * 1) See how high you fly.

In order to do this you need customized shielding (Halo: Combat Evolved) or an overshield (Halo 2). In Halo 2, this can be harder to do since the time to throw a grenade after another is longer than in Halo: Combat Evolved.

There are several ledges and places you can get to by doing this. In Blood Gulch for example, if you do this with 400% shielding on, you can reach the top of the cliff pillar near the blue base.