Boo, hiss. A homeowner was terrified to discover nearly 100 venomous snakes in a writhing black knot in his backyard — in a case experts have described as a “rare occurrence.” The trouble began last week when David Stein initially spotted a handful of the slithering creatures clustered together in his garden — leading the Australia man to immediately call in a specialized removal crew.

MELBOURNE, Australia (AP) — A man described feeling “the shudders” as more than 100 venomous red-bellied black snakes were removed from a pile of mulch in his Sydney backyard. Snake catcher Dylan Cooper arrived that afternoon. Stein helped rake away mulch as Cooper bagged 102 pregnant and newborn snakes.

By the end of the day, a Sydney snake catcher bagged a total of 102 snakes, including both pregnant females and their newborns.