The fact that everytime you drop a scrabble piece, 99.999999999 % of the time, it manages to bounce its tiny little square-ass in the direction of the gap underneath the settee.
Even though you know it's made it there, you still wave your hand on the floor thinking it will be around somewhere. But eventually, you have to lie on the floor and squeeze your hand through the tiny little gap to prise it back into the light.
I wrote way too much to explain this...