There I was, standing on the final tablet, 27 seconds to go... "Activate" appears... I reflexively hit Square... A chest icon appears. "Crap" I think... Jump down to one of the doors I knew would open at the end and... there it is! But... I didn't get the dialogue (I looked it up on YouTube afterwards cos I assumed I'd missed something). I realise I wasn't supposed to be standing on that tablet at the end of the first run but I always go there to enjoy the view while waiting for the timer... so just make sure the dialogue plays in that event for anyone who accidentally does what I did... Thanks 😊