BOSTON DYNAMICS BIGDOG

This AT-AT-style robo-hound can traverse any terrain at 6.4km/h on four hydraulic legs that mirror the articulation of a real dog’s. Add a myriad of sensors and a gyroscope and BigDog’s harder to put down than an iPad covered in superglue.

Why you should be scared: BigDog’s unarmed, but given he has a loaded weight of 260kg, you probably don’t want him bounding up to/over you.