Use bitmap and text layers to emit particles to achieve Knowing film effect. Trapcode particular will read and emit particle text from the lava cracks.

You know the good old movies shown in an old flickering and not very well timed film projector where you can see the different frames scrolling.

Apply this expression to the orientation channel of the layer you wish to have look at another
layer (the layer being controlled).

Apply this Expression to the Rotation channel of any layer you wish to control.

This expression will allow you to zoom a camera in After Effects using real-world focal length values.