It's a mystery to us. It may

It's a mystery to us. It may be a conincidence. Was the washer running? Were the items in it distributed evenly? Poorly "weighted" wash bins can cause a washing machine to "jump" while it's in a spin phase—yes, that far. Often there is a fairly loud "thumping" sound that alerts you that something is wrong; perhaps you did not hear it. If the washer was not running when you did all of this, we're as puzzled as you are.