That would be the "Accidental Discharge" willies.
Word for word! :-D (Hope it's never happened to you!)
Wahoo, I'm curious . . . why 9mm? My dad fought in WWII (N Africa and Italy), and he said he saw plenty of GIs survive being shot with a Luger, but he never saw a live German with a .45 hole in him. And even though we have to consider the current Pope's great holiness, he STILL took 4-5 9mm rounds at almost point blank range and not only walked away, he has lived many, many more years in relatively good health until recently.
Also, if you ever take up reloading, 9mm is a screaming pain to reload, because of the tapered case, and if you squash it it can mess up your headspace.