I actually worked 8 hours straight with no interruptions, breaks, or miscellaneous conversations online one day. That's the worst thing I've ever done. I really fucked myself on that day.
I suppose the worst thing I do at work, is not doing any actual "work." Although, that's pretty much a daily occurance so it doesn't bother me too much. Yesterday, I sat at my desk for five hours and did my comp sci homework. I also played solitare and read the new Stephen King book.
The absolute worst thing I did, was kick my former-boss's BMW a few times with my steel-toed boots. He was a fucking asshole and I don't regret denting the shit out of his car one little bit.
Well, it was only boogers and "oysters". I didn't do it that often and you really had to piss me off to get the "special sauce". The one I remember most was when I was working the phones, cooking and driving (I was a manager, we were slammed, so I was covering a lot). I took an order from some woman in the ghetto. She got an attitude with me about something or another but you get used to that. I ended up delievering her pizza. She complained about how long it took (can't remember but not that long), bitched me out, and generally made a huge production out of the fact that I was a stupid incompentent white boy. The next night, I was helping out on the phones again. Lo and behold, same woman calls. I recognized the voice and the address. She got the "treatment" and I even delivered it cause I didn't want any of my drivers to have to deal with her. Here's your pizza Ma'am.