Mueller kept a straight face, but inside she laughed slightly.

He shot a suspicious glance toward the barrier; then laughed slightly.

She laughed slightly at that in a self-deprecating way.

He added, laughing slightly, that they should be "basically decent people."

Robert can be heard laughing slightly after it rings as well.

She laughed slightly with shame, and in a moment got down.

He laughed slightly, realizing that remark might sound a little foolish.

"That's the way it always seems," said Seldon, laughing slightly.

I guess it's supposed to add to the mystery" He laughed slightly.

My father's got nothing to do with me She laughed slightly, raising her eyebrows.