Totally nuts.
Engineer Builds Incredible Overelaborate Backyard Squirrel Obstacle Course

This is a video of former NASA engineer and current American Squirrel Ninja Warrior course engineer Mark Rober discussing and letting squirrels have a go at his spy/heist movie inspired obstacle course and maze. As usual, Mark did an incredible job with the build, but the squirrels did an even better job figuring out all the obstacles and eventually releasing all the walnuts from Fort Knuts in the middle. Still, I feel like we need to keep a close eye on Mark because if he turns to the dark side the world won’t stand a chance against his evil villainy.