Ernesto Cabal, also known as Little Ernie or No-Way José, was feeling down and sitting on the toilet when Brian Keyes was brought into the cell by the guard. At that moment, Ernesto's mood reflected his discontent and possibly frustration about the situation he's in.
His emotional state is highlighted in this scene as he remains in his disconsolate position, awaiting whatever fate or events are to follow after Brian Keyes arrives. The scene gives a glimpse into Ernesto's personality and the tense atmosphere within the jail cell.