Husband was having his gallbladder taken out and was having complications before surgery. I needed to leave early from work for about two hours and my boss threw a fit stating I couldn't leave. I told her I had 300 hours of sick time I can use for myself and my husband and if she wanted to push I'd take all of it at once.. Leaving no one but her to do my job. She said she'd fire me if I tried.. I just looked at her and said I have to go ill send you my Dr's note.
I wasn't fired. I was actually awarded that year for job performance.
Edit: I didn't take all 300 hours. I just threatened to since I was protected by FmLA. I only took the day off..