This is very very impressive. Stable dynamic gates over even moderately bumpy terrain are Hard. Jumping is also hard and the last company to get a solid electrically powered robot to jump for bought by Google. The tricky thing though is heat. If they aren't doing active cooling then the robot will only have a few minutes of runtime. In contrast to some other commentors I think if they wanted this guy to move smoothly they could do so with this hardware, instead however they are aiming for speed.