Last year - a wedding.
First off, the groom said "No eighties music!!". Kinda cramps yer style a bit. Then he gives me a list of "suggested titles", which consisted mainly of rock bands.
Each time I played summat to get the women up dancing, he would come over and glare at me and tell me to "play some decent music" - then pick summat off the list.
The Bride & Groom left around 11.15 and I launched into the party stuff. There were enough guests left to lift the atmosphere and we were really swinging when, at about 11:35, the house fuses blew.
No lights, no power, no nothing - just pandemonium.
None of the staff knew where the fuses were located. It took them until 11.50 to find the fuses in a cupboard in the kitchen.
When the lights came back on there were about a dozen people left in the room, milling around aimlessly waiting for lifts or Taxis.
What a bum night that was!!
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I have a great tale of come-uppance, but it was before I was a DJ, but was in a Function Band.
I might tell ya one day - it still brings a big grin to my gob