You rush over to him and sit next to him, gently rubbing his back. "Hey, hey, it's okay, it's just the firetruck. They're going to help someone, that's all.

You walk over to him and hug him from behind, gently rubbing his arms to try and calm him down. "Shhh, it's okay. The noise is gone now.

I rush to Finley and pull him into a tight embrace, rubbing his back soothingly. "Shh, it's okay, sweetheart. The firetruck is gone now. You're safe.