I haven't had a nightmare in ages, but I do have chaotic, sometimes apocalyptic dreams. One of the recurring themes features an ocean whose tide waxes against the beach, raising the sea level by several feet after each recession. Last night, I had my electronics spread out on the sandy turf. I woke up calmly, treading water, holding the macbook over my head, regretting the salt-encrusted loss of all its peripherals.