Throw Exception when generating a 30,000+ byte packet

core/sync/AppEngPacket.java

@@ -36,6 +36,9 @@ public abstract class AppEngPacket
 
 	public FMLProxyPacket getProxy()
 	{
+		if ( p.array().length > 30000 ) // 2k walking room :)
+			throw new IllegalArgumentException( "Sorry AE2 made a huge packet by accident!" );
+
 		return new FMLProxyPacket( p, NetworkHandler.instance.getChannel() );
 	}