That's a very impressive story! I was hoping this post would get a bit more attention so I could read of more tales like this, but I guess this will have to do.
I assume that a robot capable of handling 400lb must have a pretty beefy power supply. You can probably get an intuitive sense of how much damage a robot can do to you by imagining what would happen if all of the power output was directed directly at your body (in the form of heat/electrical/kinetic). A tiny 5v motor might on a breadboard might be enough warm your hand up or fling a small pebble toward you, but a motor that requires one of those bigger 400v 3-phase 60A supplies can probably pull enough energy to melt iron or generate the same kinetic energy as some military ordnances.
I assume that a robot capable of handling 400lb must have a pretty beefy power supply. You can probably get an intuitive sense of how much damage a robot can do to you by imagining what would happen if all of the power output was directed directly at your body (in the form of heat/electrical/kinetic). A tiny 5v motor might on a breadboard might be enough warm your hand up or fling a small pebble toward you, but a motor that requires one of those bigger 400v 3-phase 60A supplies can probably pull enough energy to melt iron or generate the same kinetic energy as some military ordnances.