A bizarre spate of television presenters dissolving into on-air gibberish has sparked claims that the U.S. military could be to blame.

In four high-profile cases, the latest involving fast-talking Judge Judy, the presenters have started off speaking properly but have then descended into undecipherable nonsense - looking confused and unstable. 

The frequency of the 'attacks' - and the fact that recorded examples of the mental meltdowns have been popular on websites - has led to conspiracy theorists pointing the finger at shadowy government experiments.