In plain sight

It’s an endless source of amusement in the game that you have a 5% chance of not hearing a battle, smelling a skunk, or seeing the huge-sized monstrosity that draws substance from the marrow and tears of its victims.

Okay, I am aware that a natural 1 in skill checks is not the same as combat and does not confer automatic failure, but it’s no less amusing. And those “I failed a check and missed the blindingly obvious” stories are always hilarious.