"This neck piece was discovered by archaeologists in a small community in Brazil. It is said to have been used in religious ceremonies in 9 AD, though the tribe was wiped out by a more violent one..."

The docent's measured voice carried across the marble hall, where a couple in matching yellow blazers studied the ancient artifact behind its protective glass.

Glass shattered somewhere beyond the main gallery.

A woman's scream pierced the air, raw and unhinged.

The couple's heads snapped ...