Lets say your existing camera code is started by calling Normal_Camera_Action();

With the code below, the Camera_OneFrame_Function() processes JUST ONE frame of your camera code,
and Normal_Camera_Action() calls it once a frame, just like a normal camera action.
When YOUR function eg Freezer turns the freeze on, Normal_Camera_Action() will freeze, stopping the camera.

BUT, if you keep calling Camera_OneFrame_Function() from INSIDE Freezer (once a frame),
it will appear to still be running normally.

This is a pretty rough example, but is shows what I mean, I hope.
Code:
//
action Normal_Camera_Action()
{
   while(1)
   {
      Camera_OneFrame_Function();
      wait(1);
   }
}
//
function Camera_OneFrame_Function()
{
   //normal contents of camera action while loop
   if(key_w)  camera.x += 5 * time_step;
   if(key_s)  camera.x -= 5 * time_step;
   if(key_a)  camera.y += 5 * time_step;
   if(key_d)  camera.y -= 5 * time_step;
}
//
function Freezer()
{
   freeze_mode = 2;
   while(freeze_mode==2)
   {
            //do whatever you need to do, if it happens here.
            if(key_esc)  freeze_mode = 0;  //eg to abort freeze mode 
      //
      Camera_OneFrame_Function();   //draw another frame
      wait(1);
   }
}
//

Lemme know how it goes.

"There is no fate but what WE make." - CEO Cyberdyne Systems Corp.
A8.30.5 Commercial