In general, on no / lo-budget productions I find it more like this:
Lights? 'Ready'
Sound? No, no, sorry guys - there's a little buzzing coming from somewhere.
* Frantic 20 minute search finding an electromagnetic disturbance coming from the room above. Sound moves around to compensate... *
OK guys lets get it together.
Lights? 'Ready'
Sound? Erm, there's a little noise coming from somewhere...
* Frantic 20 minute search finally locating a mini fridge hiding in a corner which needs to be turned off *
OK, for f"ck's sake, let's get it together guys...
Lights? 'Ready'
Sound: * Mobile phone goes off somewhere... *
For f"ck's sake, who the f"ck left their goddam mobile phone on? Jesus H Christ, didn't you all hear the goddam instruction to turn them all off? I mean, for crying out loud, when was the last time...
* 20 minutes later following a long, directorial rant *
Lights: 'Ready'
Sound: Ready, erm, hold on a second guys I think I hear something going on outside... * Ear-piercing shriek of sirens arriving, police getting out, doors being slammed, arrests being made from the building opposite... *
* Sounds of director headbutting the wall... *