(Friday night's scenario - PA ready to roll, main fader down, ready to sound check...) Guitar player brings up PA main fader and hears "SSSSSSSSSSSSSSSS" from the mains, starts hitting channel mutes to find the source of noise (smart move). Guitar player - "ITS YOUR BASS CHANNEL MAKING ALL THE NOISE!!!! DO YOU NEED ALL THAT HIGH END????? " Drummer - "DO YOU HAVE A GROUND LIFT?!?!?!?!?!" Guitar player - (see above, yelling at me louder, repeating his statement over and over) Drummer - (see above, yelling louder, repeating his statement over and over) Me- About to lose my mind with two grown men yelling at me like I'm a small child with no concept of sound whatsoever... Finally I had enough "Shut the !@#$%^&* up and let me fix this, ok?" Drummer and guitar player look at me like I just *shot their dog*. I touch one of my strings (BOOM) and it's so loud it nearly lifted the roof off of the club. I immediately look at the input gain for my channel on the mixer - should be at 11 or 12 o'clock, it's- MAXED OUT!!! Me - "Who the !@#$ fat- fingered my gain!?!?" I returned the gain to it's proper position, I solved my own problem in 10 seconds, and all is well, except for me being so pissed I couldn't play well.