You escape the cyber-wormhole that brought you to Castle Cyberskull after seeing the things in it. You're still fine though, since you stole all his pizza rolls.
You fall into another wormhole, this time in a newer time period.
You see a black homeportal in the distance, and hear the faint humming of an MP3.
The Michael's Homepage sign shows that it belongs to an entity named Michael.
You're not sure if that's a human, a skeleton, like in Cyberskull, or something else.
After that encounter, logic tells you to GTFO, but you don't have a choice.