The Bye Bye Man.
Oh no, who is that coming through the walls at night? It's Bye-Bye, the man! Oh christ, oh puckered flesh and squirrelly bowels, he is going to say GOODBYE to me, with his waving hands and toodle-oo on his withered farewell lips! Won't someone please GOD AH save me me from the GOOD BYE MAN!! before I GO SEE YA, THEN!