At one time I was working two jobs and dead tired all the time.
My supervisor wanted me to come for his wedding.
If I did not come at all, he would have been insulted and made things harder for me at work.
If I stayed the entire time, I would have either missed the next day at work, or been so dead on my feet I would have done nothing but made mistakes and get sent home after a bad argument and possibly even lost my job.
He accepted that I was going to come for a just few minutes, say Mazal Tov, and leave.
It does not have to be about someone in the hospital for it to be a valid reason.
Also in general I do not like the extra loud music that causes hearing loss with enough exposure (much less then most people probably think is needed, to cause hearing loss.).