On a level with Christmas-themed Lemmings, if you apply the Bomber skill to any Lemming with a permanent ability (tested with a Climber and a Floater), the explosion is green rather than red.
If the Lemming is falling when you apply the skill (so it explodes instantly) or is otherwise highlighed at the point of detonation, the explosion is blue - this happens whether the Lemming has a permanent skill or not.
POST SCRIPTUM: Tested with version V10.011.011-D.