How to use "indication" in a sentence

Her inability to clean out his room suddenly frightened her; for the first time it seemed like more than just a weakness of spirit but an indication of serious mental illness

At this indication of imminent surrender, the tall man relaxed slightly, although his lumpish face was still flushed with anger

But no other indication he's in any discomfort."

His forehead was furrowed, as if he were concentrating, but that was the only indication that he had anything to do with the elevator's movement.