[salmo]

Looks suspiciusly like some of my old code, ya bastard! What Kodiak said, also below I've tidied up all those 'case' statements. You can add/remove speech lines by altering the appropriate speech string array in each section without having to change the sayToGroup code.

    public override void OnAircraftDamaged(int missionNumber, string shortName, AiAircraft aircraft, AiDamageInitiator initiator, part.NamedDamageTypes damageType)
    {
        base.OnAircraftDamaged(missionNumber, shortName, aircraft, initiator, damageType);

        // speech //   GetDamageVictims()
        AiAircraft initiator_aircraft = initiator.Actor as AiAircraft;
        if (initiator_aircraft != null)
        {
            if (speechTimer.Elapsed.Milliseconds > 1 && speechTimer.Elapsed.Seconds < 20)
            {   // timer is running & less than 20 seconds since last speech
                return;   // speech no more fequently than 20 secs apart.
            }
            else
            {
                speechTimer.Restart();
            }
            if (aircraft.Army() != initiator_aircraft.Army())
            {
                // shooting at enemy aircraft
                Timeout(3, () =>      // wait 3 seconds
                {
                    // shooting at enemy aircraft speech
                    string[] HitEnemyACSpeech = 
                    {
		        "Nice_shot",
		        "Good_shot_sir",
                        "Good_shooting",
                        "Good_show",
                        "Bullseye",
                        "Good_hits",
                        "Direct_hit"
	            };
                    sayToGroup(initiator_aircraft.AirGroup(), HitEnemyACSpeech[random.Next(HitEnemyACSpeech.GetLowerBound(0), HitEnemyACSpeech.GetUpperBound(0))]);
                });
            }
            else
            {
                //  shooting at a friendly aircraft
                // first verse
                if (random.Next(1, 100 + 1) < 75) // 25% chance of first verse
                {
                    // shooting at friendly aircraft speech
                    string[] HitFriendlyACSpeech = 
                    {
		         "Friendlies",
		         "Damn_what_are_you_doing",
                         "Damn1"
	             };
                    sayToGroup(initiator_aircraft.AirGroup(), HitFriendlyACSpeech[random.Next(HitFriendlyACSpeech.GetLowerBound(0), HitEnemyACSpeech.GetUpperBound(0))]);
                }
                //second verse 
                Timeout(2, () =>      // wait 2 seconds
                {
                    // shooting at friendly aircraft speech 2
                    string[] HitFriendlyACSpeech2 = 
                    {
		        "Cease_fire_shooting_at_friendly",
		        "Return_to_base_immediately_or_you_will_be_shot_down_",
                        "Watch_it_You_re_shooting_at_one_of_ours",
                        "Stop_fire", 
                        "Oh_my_God_Stop_Please_stop_Ooooaaaaahhh"
	            };
                    sayToGroup(initiator_aircraft.AirGroup(), HitFriendlyACSpeech2[random.Next(HitFriendlyACSpeech2.GetLowerBound(0), HitFriendlyACSpeech2.GetUpperBound(0))]);
                });
                // third verse
                Timeout(4, () =>      // wait 4 seconds
                {
                    if (random.Next(1, 100 + 1) < 75) // 25% chance of third verse
                    {
                        // shooting at friendly aircraft speech 3
                        string[] HitFriendlyACSpeech3 = 
                    {
		        "That_is_without_a_doubt_the_worst_flying_I_have_ever_seen",
		        "Return_to_base_immediately_or_you_will_be_shot_down_",
                        "Cannot_do_anything_right_today_can_you"
	            };
                        sayToGroup(initiator_aircraft.AirGroup(), HitFriendlyACSpeech3[random.Next(HitFriendlyACSpeech3.GetLowerBound(0), HitFriendlyACSpeech3.GetUpperBound(0))]);
                    }
                });
            }
        }
    }