Dyssomnia:

The wonders of sleep (disorders).

Sleeptalking (somniloquy):

Night Terrors:

Kleine-Levin Syndrome:

Narcolepsy:

Tetris Effect (trauma prevention?):

Sleep Paralysis:

Lucid Dreaming:

Hypnic Jerks:

Exploding Head Syndrome (don't take it literally):

Information on these to come, maybe? I dunno.