" TAM TAM " is a slang word in Berlin for " busy" or "ballyhoo".
A style change in technology is rare and very unusual for an artist.
Sieber goes from realism to figurative abstraction and works on the other side.
This change interrupts the routine in a painting technique and calls for and promotes this.
The thematic boundaries which are set in realism can be broken up in figurative abstraction.
Originally, Sieber worked close to this direction before he increasingly turned to realism.
From 2010 onwards he works alternating between the styles.