Show an exquisite veneer wood box which has a brass plaque on its lid depicting all 5 ESP symbols.

Now ask a spectator to freely select and remember anyone of the 5 symbols shown.

The spectator now names which symbol they have chosen.

In a dramatic and entertaining fashion a prediction is now revealed from inside the box by the performer.

The prediction showed perfectly matches the ESP symbol chosen by the spectator.

Mental Case is a completely self contained effect which can be repeated with a different outcome each time.