I want to share a tips how to create a hide animation. In Blender 2.4x i can hide an object with layer animation, but since 2.5x i can't find that feature. There are some alternative, like you move the object on the place that can't reach by the camera, or just hide it from camera.

I choose to hide the object from camera render, so you don't need to throwing object, you just need to insert keyframe into camera parameter in outline.

Almost all parameters can be filled in Blender panel keyframe,, this facility that we can use to create animations disappear in an instant. That we need to make animations like this are the properties window, the window where the available parameter to hide and unhide.

For example in the first frame I want a cube looks at the camera, while in the second frame I want cube disappeared. At frame 1, I activate the camera view and press I, the camera automatically turns yellow as in the picture below.

Insert Keyframe

Then I go to frame two, disable the camera and do not forget to insert a keyframe again, so you get yellow color again.

Insert Keyframe again

After that, try render frame 1 and frame two. See the difference. This parameter will not fading process, ie frame of the camera on, and then frame 10 camera not active. Objects will be visible in the frame 1-9, New disappeared in frame 10.