When the fire alarm goes, you're legally obliged to stop work and leave the building. Great! Problem is, you'll get the sack if you're caught setting it off whenever the fancy takes you.

Set it off legitimately, however, and you're laughing. And there's nothing that'll set off a fire alarm like burnt toast.

So to buy yourself a proper two hour, four pint lunch break, turn that toaster to full power and selotape the button down. When the bells start ringing, scarper and don't look back!