The speculators in the futures and options market on the CME have accumulated record short positions in gold and silver. Eventually, the speculators who are short will need to buy back their position. As gold and silver climb their way up, more and more futures traders will buy to liquidate their gold position. This is a plain vanilla short squeeze and does not happen so often. It will be spectacular.
The short squeezes usually evolve into full blown buying panics and the quicker it rises, the more pressure the short-sellers have to buy back their positions, thereby making gold and silver rise even faster!