Mason's Rats In a future version of Scotland, a farmer named Mason is distressed to discover the rats in his barn using tools and attacking him with crossbows. Enlisting the services of the high-tech Traptech pest control company, Mason installs five pulse lasers into his barn. The lasers are effective until the leader of the rats discovers their positions and disables each laser's camera system. At his wits' end, Mason now buys a scorpion-like mobile assault robot. For the next several days, the robot does its job gruesomely well, much to Mason's growing discomfort. When one of its laser shots destroys his mug, Mason storms into the barn, only to see the rats mounting a heroic final stand against the mech, using one of his tractors outfitted with the missing pulse laser as a tank. Mason, impressed by the rats' courage, destroys the mech with a shotgun blast. He makes peace with the rats; the group raises a glass of whisky, distilled from Mason's grain, and watches the sunset together as he cancels a check for Traptech.