It's a classic image - the adventurer makes their way through the cobweb-shrouded tomb when his foot catches on a raised slab that sinks and causes doors to slam and spikes to protrude from the walls. It's so standard that it and the like appear in movies, video games and RPGs and usually we don't even think about it; well let's start.
Just an example of how my brain clicks. I was reading an article last might that featured a picture of a D20 that is a twenty-sided die and I suddenly wondered who decided how the numbers on it are arranged. To make this simpler I'll drop down to a D6 that is a six-sided die.
Logically the probability of any of the numbers landing face-up is 1/6th non-logically the highest face should be furthest away from the lowest face. In terms of reality this makes sense for reasons I'll show with higher-sided dice. So the 1 face is positioned opposite the 6 face; using this logic the 2 face is opposite the 5 face and the 3 face opposite the 4 so each opposite pair of faces add to 7.
I recently re-read a column from rpg.net by Bryan Jonker titled "Stupid People Tricks" that tried to deal with the problems that precognition abilities cause in Role Playing Games. As, for some reason, my mind was filled with various time-travel tropes it led to resonance and herein lies the result.
