Seems more reliable than the original method but not perfect

scripts/player.gd

@@ -210,10 +210,11 @@ func _physics_process(delta):
 		
 		#Land Sound
 		if velocity.y < .1 and self.is_on_floor() and moving_fast == true:
-			print("LAND SOUND")
 			var land_volume = clamp( moving_fast_top_speed - 20 ,-10,0)
+			var recoil_amount = Vector3(-.1,0,0)
 			land_sound.volume_db = land_volume
 			land_sound.play()
+			recoil.add_recoil(recoil_amount,10,2)
 			moving_fast_top_speed = 0.0
 			moving_fast = false