Meanwhile...
Me: You guys find a key woth a triangle on it
Later that session
Me: There is a locked door with a triangle on it.
Party: This door is literally impossible to open.
Me: ...why don't you check your inventory...
Party: Aha, maybe this tomato we found can open the door if we shove it into the lock.
Me: I don't... you have a key!
Party: When did we get a key?
Me: THIS SESSION!
Party: Ohhh we didn't write it down.
Me: IT'S ONLY BEEN 5 MINUTES! GOLDFISH, ALL OF YOU!