diff --git a/src/main/java/de/studiocode/invgui/animation/impl/BaseAnimation.java b/src/main/java/de/studiocode/invgui/animation/impl/BaseAnimation.java
index bc06e6e..1969e1d 100644
--- a/src/main/java/de/studiocode/invgui/animation/impl/BaseAnimation.java
+++ b/src/main/java/de/studiocode/invgui/animation/impl/BaseAnimation.java
@@ -70,7 +70,7 @@ public abstract class BaseAnimation implements Animation {
     @Override
     public void start() {
         task = Bukkit.getScheduler().runTaskTimer(InvGui.getInstance().getPlugin(), () -> {
-            // if there are now viewers for more than 3 ticks, the animation can be cancelled
+            // if there are no viewers for more than 3 ticks, the animation can be cancelled
             if (getViewers().isEmpty()) {
                 noViewerTicks++;
                 if (noViewerTicks > 3) {
diff --git a/src/main/java/de/studiocode/invgui/window/impl/BaseWindow.java b/src/main/java/de/studiocode/invgui/window/impl/BaseWindow.java
index 40002a3..d5348b4 100644
--- a/src/main/java/de/studiocode/invgui/window/impl/BaseWindow.java
+++ b/src/main/java/de/studiocode/invgui/window/impl/BaseWindow.java
@@ -165,13 +165,13 @@ public abstract class BaseWindow implements Window, GUIParent {
     @Override
     public void closeForViewer() {
         closeable = true;
-        new ArrayList<>(inventory.getViewers()).forEach(HumanEntity::closeInventory); // clone list to prevent ConcurrentModificationException
+        // clone list to prevent ConcurrentModificationException
+        new ArrayList<>(inventory.getViewers()).forEach(HumanEntity::closeInventory);
     }
     
     @Override
     public void show() {
         if (closed) throw new IllegalStateException("The Window has already been closed.");
-        if (inventory.getViewers().size() != 0) throw new IllegalStateException("A Window can only have one viewer.");
         
         Player viewer = getViewer();
         if (viewer == null) throw new IllegalStateException("The player is not online.");