A while a go, we got a Feature Request by our client, which was a bit of a stretch. and by a bit of a stretch i mean horrible shit which is totally unusable, a technical nightmare to implement with almost no accessable data.
well, the pm gave me the Ticket. when I First read it, I wanted to puke.
since the pm wasnt in a good mood, i just wrote a large comment on where to implement that Feature to be a much less pain in the ass.

many discussions with the pm and the Client later, i Had to implement it the way, they wanted. so i started.

after one and a half week, i was almost ready, just a few hours left and the nightmare would be over
what i didnt know is that the Client came over to discuss a few things with my Boss
suddenly my Boss walks in and asked, how much im ready
then He told me THE message

i should should Revert everything ive done the last 1 1/2 weeks and implement the Feature the way, i told was better

worst friday ever