"Rock You Like A Hurricane by the Scorpions." The answer comes to him as easily as when Robin asked him. It's what was on the tape currently in his player, mixed with some others like Metallica. Because of course his Vecna songs are loud. Enough to blast that guy away if he tried to possess Billy again.

A touchstone. To keep Vecna from possessing him again. He thinks of the tape and how it had Kate Bush on loop, side A and B. He thinks about how it was only Robin who asked, neither Eddie or Harrington bothered - but that was just Billy thinking negatively. As soon as the topic came up, it had been out of Robin's mouth so everyone knew what it was in case of Vecna showing up.

"Something to ground you. Yours is Running Up That Hill. Kate Bush." Billy walks back over to the bed and pulls out tape that had come with the player. It's got Max's writing on it, with that artist and song title scrawled on it. When it clicks, he looks at her. "...Was Vecna hunting you?"

He was the stepbrother. Max's brother. It was his job to torment her like a sibling. Not someone else's. Billy knew he was dead in their world already. So he'd got to the Upside Down and rip Vecna apart if he could.