Test 1 : Put one Blufor Player, one Blufor Stomper and two Blufor Greyhawk on the Map. Connect to the Greyhawk, fly a little bit and then crash the first and then the second Greayhawks to ground, the Stomper will open Fire at the player.
Test 2 : Put one Blufor Player, one Blufor Stomper,some Blufor Greyhawk and two enemie Vehicles on the Map. Connect to the Greyhawk, fly a little bit over the enemie forces and wait that your UAV is shoot down, the Stomper will open Fire at the player again.