Battery Cable problems of the 2006 Jeep Commander

While sitting at a traffic light, most or all of the warning lights came on, wipers came on, horn started honking and the engine stalled. The horn continued to honk, the wipers to operate as if I had turned them on, which I had not. Once I was able to restart the engine, the incident stopped and operated fine until the next occurrence. The second and third time this same thing happened; I was driving on an interstate, somewhere between 60 and 70mph, and all the above random things happened again, although the engine did not stall. The fourth time I was driving in suburban traffic and stopped at a light, all the same thhings happened and the engine did stall. I was not able to stop the horn from blaring, nor shut off the high beams this time, even after the engine was stopped and the key was withdrawn. I had to disconnect the battery cable to shut off the horn and lights. Once I reconnected the battery, about an hour later, all was fine again. These 4 occurences happened over the last ~2 months at random times in various traffic and weather conditions. It's frightening to think that I may be on an interstate in heavy traffic, and the engine stalls!.