public static string BreakWalls(this OrdinaryHuman h, double wallDensity)
 {
     return($"I broke through a wall of {wallDensity} density.");
 }
        static void Main(string[] args)
        {
            OrdinaryHuman steve = new OrdinaryHuman(185);

            Console.WriteLine(steve.BreakWalls(89.2));
        }