Stavros said meekly while grinning maniacally, for he was exceedingly nervous meeting the passengers.

Alkland looked deeply unhappy about the whole experience, and I grinned maniacally at him to try to cheer him up.

One of the others grinned maniacally.

He grinned maniacally, a stupid little basic trainee way in over his head.

He then states (maniacally grinning) that "They say there are no Atheists in foxholes?

He contented himself with grinning maniacally at the Grimskull.

He was said to have grinned maniacally as he sliced his four fingers off.

He grinned maniacally and the corner of his mouth kept twitching in a torturous grimace.

Kress was grinning maniacally when he let them in.

He was both pale and grinning maniacally, which made me wheeze laughter despite the circumstances.