Richard is so excited that he can hardly contain himself.

On the one hand, he could hardly contain his eagerness.

I could hardly contain myself with the joy of it.

I could hardly contain myself when the furniture arrived two days later.

I passed it on to another audience member, who could hardly contain herself.

The three men spying on him can hardly contain themselves.

The very act of reading those words had filled me with an excitement I could hardly contain.

Something that was so exciting she could hardly contain it.

The younger male was still so excited, he could hardly contain himself.

So he could hardly contain his eagerness to bring the meeting to a close.