Crazed Mister Handy

Crazed Mister Handy are hostile robots found in the Mojave Wasteland and the Big MT in 2281.

Specifications
The crazed Mister Handy is a variant of the Mister Handy found in numerous places such as Hell's Motel, H&H Tools Factory, and New Vegas Steel. It will attack the player (and presumably any other non-robot) in sight as soon as they make contact.This appears to be because at the back of their body armor their Combat inhibitor is ripped out for some unknown reason.

In Hell's Motel, it is assumed that a crazed Mister Handy caused Doctor Rotson's death, who is presumed to be the hotel's owner. In New Vegas Steel, the crazed Mister Handys may have been participants in the factory automation test, which has been running for 204 years. As a result, the steel mills still continue to function.

Several of these crazed robots can also be found in the Saturnite alloy research facility in the Fallout: New Vegas add-on, Old World Blues.

Although they are"crazed", they are not stupid, players still need to deal with them carefully. Once they sensed player's existence, they will go after the player or look for him/her until they are destroyed, it hard to disable them using Robotic Expert perk since they are not easy to approach.