FSU = fucking stupid user 
I've just gone to change a light bulb, even though I was been gentle the glass bulb basically twisted off the metal base and sliced my thumb. It was one of those bayonet ones where you have to push gently and twist. There's still a rim of glass around the metal base.
Now is this a hazard to be expected from having electric lighting or should I take the asda own light bulb back and brandish my poorly thumb at some poor bugger at customer services?
I've already spent my 'sorry' voucher on chocolate fondant pudding and double cream AIBU?