If the thought of a two-legged robot chasing you down in the streets keeps you up at night, then you can sleep easy … for now. A droid named Cassie has set a Guinness World Record for the 100-meter dash by a bipedal robot, and while it’s far from the blistering pace of the world’s best athletes, it is an impressive demonstration of robotics and engineering.

Cassie is the brainchild of Agility Robotics, a spin-off company from Oregon State University, and was introduced in 2017 as a type of developmental platform for robotics research. And Cassie has continued to come along in leaps and bounds since then, in 2021 demonstrating some impressive progress by completing a 5-km (3.1-mile) jog in just over 53 minutes.

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This achievement involved the use of machine learning algorithms to equip the robot with an ability to run, overcoming its unique biomechanics and knees that bend like an ostrich to remain upright. With this capability, Cassie joined a group of running bipedal robots that include the Atlas humanoid robot from Boston Dynamics and Mabel, billed as the world’s fastest knee-equipped bipedal robot. But in optimizing Cassie for the 100-meter sprint, the researchers had to head back to the drawing board.

Read more: New Atlas