Answer:
I'd say the word that best describes the meaning of curmudgeonly would be yelled. A good synonym for curmudgeonly would be grouch or irritable.
Explanation: The word curmudgeonly means bad-tempered and negative, so I would assume that him yelling at the children is why the word curmudgeonly is used to describe him.

I didn't went there.. Because I live at New York... what was like being there! :>

I would have to say witty is the best adjective to describe interlude. Traditionally, they were moments of comedy and relief to be used as a resting period between the moment of a miracle and morality in plays. They could also be pieces of entertainment on their own.