i used to work at an advertising agency, which i regreted since the first day of work, based on their crappy portfolio.
the so-called creative director and owner of the agency asked for a x-mas ad for a small client (related to construction), that was going to be printed on a small town, b&w paper. after lots of very creative headline ideas (by the way, i worked as ART DIRECTOR there, but unfortunatelly, i had to also write all the copy), the asshole was still not happy. so, i managed to MAKE FROM SCRATCH some images (yeah, you guessed right: they couldn't afford to photograph or buy any images). i managed to get images from the web and change them on photoshop. i managed to do miracles for that small, b&w shitty ad for the boring client. everytime i showed my boss, he replied "i need something CREATIVE! i want something NEVER SEEN BEFORE!!!". this went on for about 2 weeks, mixed with lots of other "exciting" jobs. well, long story short: on the dead line day, after finally getting a "sort of approval", i went out for lunch. when i return, the account manager asks me to send the client the final version of that ad. when i looked on my directory, i see a new version, not done by me. i later found out it was done by my boss, who sneaked on my computer during my lunchbreak, used my previously done art, and just changed the headline. he said it was perfect that way, it was the final version, he was a genious, yadda yadda yadda.
the cutting-edge headline, you ask? "MERRY CHRISTMAS AND A HAPPY NEW YEAR".
i quit a week later.