Now They Fly?
The achievement can be unlocked by shooting an enemy with the Warthog's M46 LAAG or by sitting in the vehicles' passenger seat and shooting enemies with a weapon. Landing on and splattering an enemy will unlock the achievement for the driver.
The achievement can be earned on Harvest and Wreckage, the two Crimson maps which feature Warthogs. Harvest arguably provides the greatest chance for passengers, as the map features numerous ramps which players can use to get airborne. Wreckage features perhaps the best chance to earn an aiborne splatter, which the player can achieve by driving the Warthog through one of the man cannons. This will propel the Warthog through the air onto the top cliffside mesa which players often fight to control.