When my boss called up in the office, he gave me an extra project that he carried on. It was an emergency, but I had to deliver the next day.
I was so tired at work, but I still had to deliver because my boss tortured me. Even when I got home at 12:00am, my boss still had to call me because of how important it is and ask me if. I told him that I'm on it. He was so happy. I assured him that he's going to get everything prepared the next day.
I had a sleepless at night. I was still able to deliver. He thanked me so much. Sometimes you have to do this for free pay. It might not cost you a dime. It might not promote you or anything. Just do it for the freedom and love of the company.