DozyWannabe
Actually full motion simulators are useful to teach pilots NOT to trust their somatic senses when flying purely on instruments. It is extraordinarily easy to fool somebody into thinking they are accelerating forward simply by tipping them back. This is done in amusement park simulator rides all the time. Heck, even simple manipulation of the seat's configuration can lead to a feeling of (slight) upwards acceleration.
A full motion simulator can drive that point home to pilots who do not quite get it. PF apparently did not get it. He remarked about high speed. He was tilted back and drew the wrong confusion from his senses.