diff --git a/Engine.Core/Helpers/Event.cs b/Engine.Core/Helpers/Event.cs
index 13d112c..3b4a6db 100644
--- a/Engine.Core/Helpers/Event.cs
+++ b/Engine.Core/Helpers/Event.cs
@@ -5,6 +5,12 @@ using Engine.Core.Debug;
 
 namespace Engine.Core;
 
+// TODO!: every reverse loop has a chance to have more than 1 unsubscription,
+// for (int i = listeners.Count - 1; i >= 0; i--) 
+// can be replaced with 
+// for (int i = listeners.Count - 1; i >= 0; i = Math.Min(i - 1, listeners.Count - 1))
+// but this would causes possible double calls on already called callbacks, find a better method.
+
 /// <summary>
 /// Represents a simple event with no parameters.
 /// <para>Example usage:</para>