tea-spoon                                                                                                                 © 1974   

24 taps of a teaspoon 
on the window sill.

A different original sound of the teaspoon tapping on something is ascribed to each and every tap. 

Each of the 24 audiovisual happenings (as a film phenomenon) is real. 

Each of the 24 audiovisual happenings (as a film phenomenon) is not real.

35 mm film, 2 minutes, 1974.