I was just next to muskets firing, to be exact. It was during
this festival, in Belgium. At one point there were 4 or 5 men dressed in traditional firemen clothes (from the 19th century I guess) parading in the streets. Each of them had a musket and I never imagined they would use them.
Unfortunately, they fired with their muskets, and since misfortune was really with me that day, they fired just when they were at my level, maybe one or two meters from me. I did not see it coming because something else drew my attention at this instant, so I did not protect my ears. The next second, an incredibly loud noise surprised me, it was by far the loudest noise I had ever experienced (still the loudest to this day). It was so loud that I experienced deafness and a very loud tinnitus for one second.
I was so angry. I protected my ears from non dangerous noises earlier in the day and that extremely loud noise happened when I was not protected. I was worried all the rest of the day about this and went to see an ENT in emergency in the evening. She checked my hearing and it was fine. This event did not affect my tinnitus but it scared me as hell.