What is a "High Energy Object"?

[Xithras]

10. Solid masses traveling at high rates of speed.

In this case, most likely shrapnel from a missile detonation. Contrary to what Hollywood would have you believe, anti-aircraft missiles don't actually explode in massive fireballs causing nearby aircraft to simply burst into flames. Real anti-aircraft missiles are like giant grenades. They contain a high energy explosive charge wrapped in material that will fragment outward when it detonates. Imagine thousands of tungsten or DU metal fragments expanding outward faster than the speed of sound, slamming into an aircraft built out of aluminum. Those fragments will sever everything from fuel and hydraulic lines, to fuel tanks and pilot bodies. It's like being hit by a gigantic shotgun.