He was out of sorts.

Garry, talking of honor and letters, had given him a bad interval of indecision and guilt.
"It--it's amazing!" went on Sid.

"You were all right at breakfast--" Kenny wheeled furiously.
"Sid," he snorted, "you're amazed when it rains.

You're amazed when it snows.

You're amazed when the sun's out and amazed when it isn't.
Thunder-and-turf! you're always amazed!" Whereupon he stalked out with his suit case and slammed the door.
Sid pursed his lips and shook his head, his gaze riveted upon the door panels in round-eyed incredulity.