That is a common simile, but it is descriptive.

The acting of an actor depends upon his audience.

While my audience was composed of fools, I fooled them; but when you came--you with your scepticism, your curiosity, your feminine dependency--I lost my cue.

I became conscious of the footlights and the make-up." Again he paused; and again he endeavored to read her face.

His manner was still restrained, but below his calm were the stirrings of a deep agitation.