I was giving a demo for a university project. It was a simulation of a bunch of healthcare robots in a 3D world.

When the demo started, two of the robots attempted to path through the front door at the same time and promptly got stuck on each other. We were allowed to manually unstick them, so we did so.

Once they were going again, they decided to not to turn down the hallway like they were supposed to. Instead, they drove through one of the walls of the house and continued until they disappeared of the screen.

We never saw them again.