Make a Mario 64 rom hack called Super Duper Mario 64 where every coin permanently increases Mario's size by 0.01%, every 1-up mushroom by 0.1%, and every star by 0.5%. Don't tell anyone, though, and put in some red herrings, like starting with the Yoshi triple jump, and an old school power star flashing effect on Mario while wearing one of the special caps or something. Then see how long it takes anyone to notice the embigenning.