He had to laugh at the irony of his end.

It made sense in a way, though he had to smile despite himself at the irony of the situation.

She smiled to herself at the irony of that thought.

She watched him light up a little at the irony of that.

If the situation wasn't so serious, he'd laugh at the irony.

And he smiled again at the irony of the word.

I smiled at the irony of being told to watch my mouth.

His heart went cold at the irony of the situation.

The first officer shook his head at the irony of it.

She shook her head at the irony of it all.