In the mid 90's I was driving an 18 wheeler on a lone stretch of highway in northern Nevada. The ceiling cloud fog cover was about 2-3 thousand feet and out of no where 2 HOGS dropped through, lined up on my truck and did what appeared to be a simulated gun run on me. I just about crapped my pants!
I use to be an ordnance mech on the F-18 and I have personally seen what the 20mm gun can do and I don't want any part of that 30.
On another occasion, while still in the service, our squadron was deployed to Oceana Virginia NAS. I was out on the flight line watching a USN pilot testing out an F-14 tomcat in the air when I noticed a USAF A-10 taxiing just on the other side of our A/C. I managed to walk over to his parking spot as he pulled in, and set his brake. While standing there just off the left side nose, a big metal door came flying open (ladder to cockpit) and hand painted on the inside of the door was a big pink MISS PIGGY from the muppets staring at me. It kind of spooked me and I think the pilot knew it would as I jumped back about 10 feet.