The Thing on the Ceiling's page

Dozens of driders sit on the tiers surrounding the arena....

Mr Clean's shot takes the drider between her bloodshot eyes, and her head explodes! Her arachnoid corpse is dislodged from the ceiling and lands in the midst of the ogres and otyughs with a wet plop!

Initiative 1d20 + 2 ⇒ (11) + 2 = 13

Perception 1d20 + 15 ⇒ (12) + 15 = 27

SO!! It seems we have uninvited guests, boys.... Let's treat them to our unique brand of hospitality, shall we?