I think it's been twice now that I flew an aerobatics sortie on an aircraft, which coincidentally happened to be the last sortie of that aircraft before it went in for a routine check. During those two checks they subsequently found beginning hairline fractures or corrosion in things like engine mounts and rudder hinge brackets. Enough to cause the aircraft to be grounded for weeks while stuff was being re-welded or replaced.
Always makes me wonder what other defects have not yet been found, or are currently developing, while I pull another 4G.
I also had a near miss on climbout. This was one of my first solo flights (might've been my QXC even), in controlled airspace (class D) where a PA28 strayed across the upwind leg, fortunately some 20 feet above my flight path. I sometimes still see the whites of their eyes in my dreams. Then, I was simply too stunned even to file an airprox report. Come to think about it, I don't think I even discussed it with my instructor afterwards.