I was in the control room mixing the record feed and monitors for a concert featuring a Broadway actor from around here. The first song was an acapella song and then the band joined in. I look down to see the LEDs light up on every channel except the guitar. PFL, absolutely nothing. C'mon it worked an hour ago. I run down to the stage and stand behind the upstage leg. The 1/4" cable going from the out of his pedal board to the DI was just laying there. I quickly snuck out and plugged it back in and ran back up to the control room. Moral of the story: insist on getting enough mics to mic the **** cabinet. DI = not for guitars in 95% of situations. Sad thing: the front of house human never noticed.