We had major gear failures at our gig last night. I'm trying to figure out if it was my fault and if so what I should do about it. Here's the story. The stage had *no* outlets, so the guitarist ran an extension cord to the same outlet that the cash register was on. He plugged his gear into a surge protector strip on the end of it. He also has a surge protector on the other end at his pedalboard. When I plugged my rack in, also surge protected, I heard a loud pop. I yanked the plug and checked everything I could think of, but didn't see anything. I plugged back in and everything seemed fine. 10 minutes later the guitarist says his relatively new Boss pedalboard isn't working. We try the outlet w/ the tv on it. Nothing. 10 minutes later there is a burnt smell coming from my rack, it's my little rackfan dying. We run a longer extension cord downstairs into the kitchen, which allows me to realize that my compressor + adapter, subharmonic synth, and eq pedal adapter have all died. We quickly rearrange all of our gear because it's time to play, and actually do a halfway decent job despite losing so many tone tweakers. So, now it's the next day and I've taken everything apart and I'm trying to figure out if I'm responsible. Yes, my plugging in made the pop, but was it because something I plugged in was bad, or because the circuit was already overloaded? Why did stuff seem to work when I plugged in the 2nd time? Why didn't any of at least 4 surge protectors trip? Why didn't the house breaker trip? Why didn't my BBE fail? It was on and plugged into the same circuit that fried everything else. If it was something in my rack, I have 2 primary candidates. My fan is older than me, but it has worked fine in that rack for at least 8 months. My subharmonic synth was bought off of ebay, and last night was the 1st time I used it, but I did test it at home and it worked fine except for a wonky pot. I opened it up today and there are no burnt spots on the circuit board but it's definitely dead. As if all this wasn't enough, 1 of the powered PA mains failed last night too. I don't know for sure, but I think it was an unrelated problem. Please help. What should I look for? If my fan or synth did cause the problem, should I offer to buy my guitarist a new pedalboard? How can I know it wasn't his or the venue's fault?