There's a webcomic called Order of the Stick about D&D characters that regularly talk about XP, going up levels, etc. The best of course was when the party needed a big diamond for something, so the thief character crawled out of the page, went to her own bio webpage on the same site, and 'stole' a diamond from her bio pic. After that her bio pic didn't have a diamond anymore.
As for video games, Metal Gear Solid did stuff like this, such as when one character you are fighting can easily block all your moves because he can 'read your thoughts'. The trick is to plug your controller in the other slot, then he finds that he can no longer read your mind. 😆
