In the autumn of 2011, a Yup'ik villager named Vincent Wasley, his sister Grace, and a cousin traveled by skiff up the Kayugajak Lake River system near Nunapitchuk for a moose hunt. Stepping onto the riverbank, Vincent walked 200 feet onto the open tundra to forage a local berry patch, where he was suddenly halted by a colossal, booming cow-moose call imitation that echoed powerfully around the entire lakebed. Recognizing that the extreme acoustic volume and length exceeded human or animal capabilities, Vincent retreated to the skiff in shock.