Her eyes regularly glow bright red, and she has an extremely sinister laugh.

His answer was a sinister laugh; the square walls plucked it.

He followed up a conniving smile with a sinister laugh.

A low, sinister laugh swept from the man at the wheel.

One sound, in particular: the tone of a sinister laugh.

From those same lips came the low echo of a sinister laugh.

Then, to his ears came the low tones of a sinister laugh.

Again, a low, sinister laugh came as an uncanny whisper.

Two minutes had passed since the fading of that sinister laugh.

Then came a loud, sinister laugh, from the center of the room.