Discussing Ch'an in terms of the moon: both had a good laugh
The gatha says:
This and that were strung through; the two of them shared a hearty laugh,
and everything was penetrated.
Late at night, he asked the Master to return and take his rest.
Back at Gold Mountain, he attained the One - the place of true rest.
All day long he leveled the ground and did not boast of his work.