[Dennis actually jumps, cursing before starting to laugh.]

Fucking hell, Inigo- gave me a heart attack.

[He's not mad, it's okay! Just scared him.]

Indoor voice, mate. Firetruck is a vehicle we use to fight fires. Got a big uh... canon? That shoots really powerful streams of water to put out fires. Gets all our gear and us to fires too. Got a big ladder on it so we can climb to higher floors in buildings.