It's Hiyori's laugh that does it, although he also takes note of her smiling eyes, which in turn brings a bit of mirth to his own expression. He'd attribute any of Bishamon's wins to Kazuma's abilities more than the skank's.

Even Yato has to admit that there's something a touch unnerving about the shabby car they're directed to, though hopefully it's just been made to look that way for Halloween and isn't actually so... dilapidated? Though like her he'll just be happy if the damn thing keeps its wheels on the track and gets them through safely.

As he's handed his own paintball gun, he starts examining it to try and get a feel for where everything is on it. Safety... Safety... That's some kind of catch, isn't it? At least he's pretty sure. Leaning over towards Hiyori, he points out the thing he thinks is the safety.]

That's it there. I think. But no, you gotta disengage it in order to fire. It's a little like a crossbow in that regard.

[The ride starts out slow enough, thankfully, allowing him to take aim at a cardboard cutout zombie and pull the trigger. Nothing. Huh... Okay, so flip that thing and-- there we go! He tries again and manages to shoot finally, his aim wide. It draws a nervous laugh out of him, so powerful was the force of the thing.]

T-This is going to take some getting used to.