Makoto checked the fuel gauge. Half-full. "Saito, got some oil here for you to use."
His friend replied quickly. "That's great but need more than just oil to make an effective fiery barricade. Need to build a pile of stuff that'll burn long and hard. Clothes, luggage, that kind of thing. Put them ahead of where I am."
So Makoto set about collecting suitcases, chair seats and other flammable materials. Zipping around on his thrusters allowed him to quickly move items back and forth until he had a neat pile a few meters ahead of Takamori.
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Takamori watched his friend work whilst he listened to the others talk. "Arai-hei, that idea would be a good idea except for two things. One, I'm out of explosives. Two, there's easier ways to do a trap without losing even part of the concussive force of an explosion. But again, I've nothing else that goes boom. It's all sticking on the walls to cause a cave-in. So would someone please ask the Peacekeepers what they have that explodes?"
He saw that Makoto was finished. "Bring the fuel tank over here while I set this up."
The odd pile of suitcases, discarded clothes, and chair seats was arranged to form a knee high wall. Once Makoto returned with the fuel, Takamori liberally doused the clothes, luggage and seats in it. It would be their first line of defense.
Then the two went to erect another barricade with the passenger cart and other debris between them and the point where Takamori had placed his explosives.