Cereal Derilium

Here’s a post
For your funny bone:
A vestige of Boo the Ghost
His cereal to atone
This ghost with the most
Has you cornered alone.

Too late, you’re toast
You utter a groan:
Boo’s guitar can boast
A most torturous tone.
Should you humor your host
Or speed away like a drone?

Else:
As Boo-Berry brings you to tears
Stuff the cereal in your ears!

Ragtag Daily Prompt: "vestige"