10-80 is the police radio scanner code for an explosion.

↓ Transcript
Panel 1:
[At the police station.]
Marianna Veronisci: "Alright boys, we got a report of a 10-80 off Harbor & Jefferson."

Panel 2:
[Tommy Gunn and Mickie Potatoes brawl over who gets out the door first.]
Marianna Veronisci: "Relax you two! It’s not a competition--"

Panel 3:
[Switch perspective to show Mickie Potatoes and Tommy Gunn outside the door and Mrs. Veronisci inside.]
Marianna Veronisci: "--with you two being partners and all!"
[Tommy Gunn drops his donut.]