R4D BO1 was a cleaning droid stationed at Cloud City. He was one of the first cleaning droids at Cloud City to actually be programmed with more advance A.I, thus giving him a wider range of knowledge and a personality. Unfortunately, this came with a downside as R4D BO1 turned out to be quite possibly the biggest robotic cunt stain to ever erect his metallic dong in the galaxy.
One day, one of the maintenance guys up at Cloud City must have become extremely fucking bored, and we mean REALLY fucking bored because for what ever reason he decided that tampering with the circuitry on one of the cleaning droids was a good idea. The cleaning droids were usually mindless drones who would do nothing but endlessly mop the fucking floors so they remained constantly shiny and new that way everyone's OCD boners didn't get cockblocked.
The maintenance guy fiddled around with R4D BO1's wires (and probably his own 'wires' too) and soon managed to add further adjustments to the machine. He turned R4D BO1 off and then on again to see if his improvements had actually worked (anything to boost his already declining ego) but all he was greeted with was a swift "FUCK OFF YOU CHEEKY SHIT HEAD I WILL REK U" from R4D BO1. This was followed with R4D BO1 delivering a quick punch in the nuts to the maintenance guy before stealing a ship and flying off to find new adventure.