First software refactoring in the company I worked for. No test environnement because "who needs it?", no unit testing, no comments, had to make sql updates and shit, was scared all day long that something would fuck up.
"Fuck fuck fuck, forgot a part of the where !" Had to fix everything quickly so no one would notice, no coffee/smoke pauses. On top of that, got a ton of retarded requests from the PM and other technicians working with me like "hey boi, could you add an icon to every button we made? There's like a thousand, we need it for tonight, our client will come visit us and I want to show him a better interface blablabla"
And since I was an intern, I couldn't refuse, had to work like a prostitute in virgin-land, and for what?

"Oi, you did good, now do other stuff"