There was some really weird things going on in the house I was inspecting this morning. Lights were flickering. The bathroom light became brighter when I turned on the wall heater, the hall lights dimmed. When the heat pump kicked on, all the lights went bright for a second.
Inside the panel there were a few melted wires, but probably from a water heater fuse blowing.
I started to trace the ground wire and went into the crawlspace where it was connected to a water line. I could see the clamp was loose and as I went to get close to shoot a photo, I bumped the ground and a big arc shot out at the connection.
I just about messed my pants.
Here's the photos...