diff --git a/OpenRa.Game/Graphics/Animation.cs b/OpenRa.Game/Graphics/Animation.cs
index 563f1d478e..8ef35e229c 100644
--- a/OpenRa.Game/Graphics/Animation.cs
+++ b/OpenRa.Game/Graphics/Animation.cs
@@ -49,6 +49,11 @@ namespace OpenRa.Game.Graphics
 			frame = f % CurrentSequence.Length;
 		}
 
+		public void ReplaceAnim(string sequenceName)
+		{
+			CurrentSequence = SequenceProvider.GetSequence(name, sequenceName);
+		}
+
 		public void PlayThen( string sequenceName, Action after )
 		{
 			backwards = false;
diff --git a/OpenRa.Game/Traits/RenderBuilding.cs b/OpenRa.Game/Traits/RenderBuilding.cs
index 8cac5aae68..f0fdc3ece3 100644
--- a/OpenRa.Game/Traits/RenderBuilding.cs
+++ b/OpenRa.Game/Traits/RenderBuilding.cs
@@ -59,7 +59,7 @@ namespace OpenRa.Game.Traits
 			yield return Pair.New(anim.Image, 24f * (float2)self.Location);
 		}
 
-		void INotifyDamage.Damaged(Actor self, DamageState state)
+		public virtual void Damaged(Actor self, DamageState state)
 		{
 			switch( state )
 			{
diff --git a/OpenRa.Game/Traits/RenderBuildingTurreted.cs b/OpenRa.Game/Traits/RenderBuildingTurreted.cs
index ca2bcfe259..e5fb905343 100644
--- a/OpenRa.Game/Traits/RenderBuildingTurreted.cs
+++ b/OpenRa.Game/Traits/RenderBuildingTurreted.cs
@@ -5,7 +5,7 @@ using System.Text;
 
 namespace OpenRa.Game.Traits
 {
-	class RenderBuildingTurreted : RenderBuilding, INotifyDamage
+	class RenderBuildingTurreted : RenderBuilding
 	{
 		public RenderBuildingTurreted(Actor self)
 			: base(self)
@@ -19,7 +19,7 @@ namespace OpenRa.Game.Traits
 				() => self.traits.Get<Turreted>().turretFacing / 8);
 		}
 
-		void INotifyDamage.Damaged(Actor self, DamageState ds)
+		public override void Damaged(Actor self, DamageState ds)
 		{
 			switch (ds)
 			{
diff --git a/OpenRa.Game/Traits/RenderBuildingWarFactory.cs b/OpenRa.Game/Traits/RenderBuildingWarFactory.cs
index 2d1acb1ad0..e9cbf21fe0 100644
--- a/OpenRa.Game/Traits/RenderBuildingWarFactory.cs
+++ b/OpenRa.Game/Traits/RenderBuildingWarFactory.cs
@@ -13,6 +13,7 @@ namespace OpenRa.Game.Traits
 		bool doneBuilding;
 		bool isOpen;
 		public readonly Actor self;
+		string prefix = "";
 
 		public RenderWarFactory(Actor self)
 			: base(self)
@@ -24,7 +25,7 @@ namespace OpenRa.Game.Traits
 			{
 				doneBuilding = true;
 				anim.Play("idle");
-				roof.Play("idle-top");
+				roof.Play(prefix + "idle-top");
 			});
 		}
 
@@ -46,15 +47,30 @@ namespace OpenRa.Game.Traits
 				new float2(b.Right, b.Bottom)).Any(a => a.traits.Contains<Mobile>()))
 			{
 				isOpen = false;
-				roof.PlayBackwardsThen("build-top", () => roof.Play("idle-top"));
+				roof.PlayBackwardsThen(prefix + "build-top", () => roof.Play(prefix + "idle-top"));
 			}
 		}
 
 		public void EjectUnit()
 		{
-			/* todo: hold the door open */
+			roof.PlayThen(prefix + "build-top", () => isOpen = true);
+		}
 
-			roof.PlayThen("build-top", () => isOpen = true);
+		public override void Damaged(Actor self, DamageState ds)
+		{
+			base.Damaged(self, ds);
+
+			switch (ds)
+			{
+				case DamageState.Normal:
+					prefix = "";
+					roof.ReplaceAnim(roof.CurrentSequence.Name.Replace("damaged-",""));
+					break;
+				case DamageState.Half:
+					prefix = "damaged-";
+					roof.ReplaceAnim("damaged-" + roof.CurrentSequence.Name);
+					break;
+			}
 		}
 	}
 }
diff --git a/sequences.xml b/sequences.xml
index dd5bc85b49..9c1a83451e 100644
--- a/sequences.xml
+++ b/sequences.xml
@@ -107,9 +107,9 @@
     <sequence name="damaged-idle" start="1" />
     <sequence name="make" start="0" length="*" src="weapmake" />
     <sequence name="build-top" start="0" length="4" src="weap2" />
-    <sequence name="build2-top" start="4" length="4" src="weap2" />
+    <sequence name="damaged-build-top" start="4" length="4" src="weap2" />
     <sequence name="idle-top" start="0" length="1" src="weap2" />
-    <sequence name="damaged-idle_top" start="4" length="1" src="weap2" />
+    <sequence name="damaged-idle-top" start="4" length="1" src="weap2" />
   </unit>
   <!-- helipad -->
   <unit name="hpad">