One time in the early 90's a buddy and I 'shroomed at my cabin. It was middle of the summer, and a big line of storms rolled in just as things began kicking into high gear. My cabin has a pavilion roof over it which protects everything from the elements, so we can stand outside on the deck and enjoy the show.
I happened to have my Kramer Focus and amp there at the time, and given the crash/boom aspect of the storm, I evidently felt it was appropriate to add the Kramer to the mix. I cranked the amp as high as it would go, and pretty much used only the volume pot, harmonics, and the tremelo only - letting feedback do most all the work...not really playing any notes or songs in particular, just making noise nonsensically.
All I had to do is stand close to the amp and the damn rig would just begin to howl. One time during all this I evidently got distracted and put the guitar on the stand and walked away...it started feeding back and just sat there screaming in pain for about 15 minutes before I even noticed.
I can only imagine what we would have looked like if a neighbor had been there and drove by. Two mushroomin' freaks crawling around the place during a thunderstorm with an unattended guitar howling uncontrollably.
From what my buddy tells me about this day, this went on for a full hour or so and the volume was obnoxiously loud. There's a picture he took during this when he snapped it exactly as a lightning bolt came down nearby to light things up much like a flash bulb. The look on my face can only be described as "tortuous".
Ahhhhh, the adventures one has when they're young...