I worked two months for free, 15h per day, including weekends, due a contract trap. On top of that, client was emotionally blackmailing me and I was feeling threatened and helpless.

I even lost weight, skipping meals to save time and money. One day, my body collapsed. I ended up in bed for 10 days, feeling stiffness, pain, weakness, and shakiness. I even had to ask for help to brush my teeth.

I abandoned the project, and didn't receive any payment. The client went crazy and made me feel the worst person in the world for being sick and unable to work. But didn't put his menaces in execution.

I still remember the joy I felt when I was able to walk again.

That was the worst burnout I had, and also one of the biggest lessons about limits and evil people.