diff --git a/ToyEngine/src/DemoWorld.cpp b/ToyEngine/src/DemoWorld.cpp
index 8c4046d..cc5bfd7 100644
--- a/ToyEngine/src/DemoWorld.cpp
+++ b/ToyEngine/src/DemoWorld.cpp
@@ -65,7 +65,7 @@ DemoWorld::DemoWorld()
 
 		if (i != 0)
 		{
-			float ks = 300, kd = 500;
+			float ks = 300, kd = 100;
 			physicsManager.addSpring(particles[i - 1], particle, 0.005, ks, kd);
 		}
 	}
@@ -98,12 +98,12 @@ void DemoWorld::logicalTick(float deltaTime)
 		mk2->setEnableGravity(true);
 	}
 
-	if (mk2->getPosition().y < 6.5f && mk2->getSpeed().y<0)
+	if (mk2->getPosition().y < 7.5f && mk2->getSpeed().y<0)
 	{
-		particles[particles.size() / 2]->setSpeed(particles[particles.size() / 2]->getSpeed() + mk2->getSpeed()/2.f);
+		particles[3]->setSpeed(particles[3]->getSpeed() + mk2->getSpeed()/2.f);
 		mk2->setEnableGravity(false);
 		mk2->setSpeed(glm::vec3(0));
-		//mk2->setPosition({ 0,-100,0 });
+		mk2->setPosition({ 0,-100,0 });
 	}
 
 }