Most pissed off I've ever been at work when was I attending some development meeting about the "slow progress we were making", in which the boss (same one giving us shit for being slow) came up with several new good ideas that he wanted implemented ASAP. Same thing he'd been doing all year; fucking up our plans and adding a metric shitton of feature creep. I tried to give realistic estimates for how long it would take to implement, and casually mentioned that working on this would also push back the other stuff on our plate, but he snapped at me and accused me of being a "negative influence" and "sabotaging the project", and went on in a long rant about how we didn't take the work seriously enough and that we didn't put in enough effort.

I was a hair's breadth away from flying over the table and strangling him with his keyboard cable, and the only thing that kept me in check was the tiny amount of steam I vented by snapping the pen I was holding in two. We'd been working overtime every day for months to try to meet his insane demands and accomodate him by doing all the changes and additions he wanted done, and I found his tirade - mainly targeted at me - highly unfair.

Somehow I managed to exercise restraint, and I'm not sure if he even realized what happened.