Fixing small bugs.

Assets/Scripts/CranePickDrop.cs

@@ -52,8 +52,13 @@ public class CranePickDrop : MonoBehaviour
         if (state == State.Catching)
         {
             Debug.Assert(handlingBody, this);
-            Debug.Assert(magnet, this);
 
+            if (handlingBody == null)
+            {
+                state = State.Idle;
+                return;
+            }
+            
             magnet.strength = magnetStrength;
 
             if (magnet.IsCloseTo(handlingBody, 2f))

Assets/Scripts/Interactable/HammerableRigidbody.cs

@@ -6,6 +6,8 @@ public class HammerableRigidbody: RigidbodyInteractable
 {
     public override void Use(InteractionController im)
     {
+        manager = im;
+        
         if (im.hands.item == null)
         {
             base.Use(im);

Assets/Scripts/Magnet.cs

@@ -15,6 +15,11 @@ public class Magnet : MonoBehaviour
 
         if (otherRb && otherRb.isKinematic == false)
         {
+            if (!otherRb.GetComponent<Product>())
+            {
+                return;
+            }
+            
             Vector3 dir = otherRb.position - transform.position;
             float dirSq = Vector3.SqrMagnitude(dir);
             float forceMagnitude = strength * (1.0f / dirSq);