The only way to appease the creature was to play music at it the older music the better. Whenever the music stopped, it'd stop its melodic swaying, freeze, and then let out the most terrifying and deadly cry. Eardrums bursting, glass shattering, electronics exploding, eyeballs melting that kind of cry.
After that, it would disappear, only to reappear at the most inconvenient place imaginable, ready to explode again. If those around it valued their spleens, they would start digging for their MP3-players right away. The more musical amongst us might start a serenade, or some kind of ad-libbed drumming session on whatever's nearby.
But the creature's appetites for quality only increased as the days passed and no-one had yet figured out a way to communicate, capture or otherwise kill the thing. The tinny sound of a radio would only calm it for so long, sometimes even making it angry enough to lash out a protuberance and destroy the offending equipment. Then it woul