"I approached him in secret, and when I inched closed to him while still in stealth mode, I saw him doing a number two. And when he left, I quickly pulled out a piece of wood that was buried in the ground, smeared a part of his poo onto that piece, and fled to his house to then smear that poo onto the doorknob of the front door.
"I then hid quickly and waited patiently for him to open the door. When he held the doorknob, he shouted... "'CURSES! WHY IS THERE SOME EXCREMENT ON MY DOORKNOB?! THE ONE WHO OWNS THIS EXCREMENT SHALL DIE!!'
"And there you go. The vampire was hoist by his own petard. The end."
Of course, I want to give the writer of the meme proper credit, since I'm just taking his words and putting them into a song; so I'm messaging him pronto.
He quickly replies, "Sure. You can turn that into a song. Honestly, no one knows who wrote the meme in the first place. It's a riddle for the ages. I just shared it, y' know."
Alright. It's all clear.