Watch this laser-guided knife throwing machine nail 10 in a row

It looks like a video game, but it's actually a portable, mechanical, computerized, laser-guided knife gun that throws knives end over end through the air.

This isn't a slingshot or spiral Kunai shooter, it's a device that can accurately throw knives just like a pro, hitting a target 10 times in a row at different distances. It required calculating how to spin a knife the right number of times to land tip-first, again and again and again, and using a homemade lidar laser guidance system to measure that distance and adjust the knife's trajectory accordingly.

My knife bounced off the target many times at the last renaissance faire I attended.

The final contraption uses an electromagnet attached to a carriage and a pair of motorized belts to propel upwards of 10 knives from an integrated, spring- loaded magazine onto an electromagnet attached to a carriage, which zooms forward along its track at 10 meters per second thanks to a pair of motorized belts, The knife is released when the carriage reaches the halfway point of the track.

I think you can addknife throwing to the list of tasks where humans are no longer needed.