  This article reports on an experimental study of the fluctuations of energy
flux between a granular gas and a small driven harmonic oscillator. The
DC-motor driving this system is used simultaneously as actuator and probe. The
statistics of work fluctuations at controlled forcing, between the motor and
the gas are examined from the viewpoint of the Fluctuation Theorem. A
characteristic energy $E_c$ of the granular gas, is obtained from this relation
between the probabilities of an event and its reversal.
