Here are a few:
On Tesco's Tiramisu dessert:
Printed on bottom of the box, do not turn upside down.(Too late! you lose!)
On packaging for a Rowenta iron:Do not iron clothes on body.(But wouldn't that save more time?)(Whose body?)
On Boot's Children's cough medicine:Do not drive car or operate machinery.(We could do a lot to reduce the construction accidents if we just kept those 5 year olds off those fork lifts.)
On Nytol sleep aid:Warning: may cause drowsiness.(One would hope!)
On a Korean kitchen knife:Warning: keep out of children.(hmm...something must have gotten lost in the translation...)
On a string of Christmas lights:For indoor or outdoor use only.(As opposed to use in outer space.)
On a food processor:Not to be used for the other use.(Now I'm curious.)
On Sainsbury's peanuts:Warning: contains nuts.(but no peas?)
On an American Airlines packet of nuts:Instructions: open packet, eat nuts.(somebody got paid big bucks to write this one...)
On a Swedish chainsaw:Do not attempt to stop chain with your hands.(Raise your hand if you've tried this..)
On a child's Superman costume:Wearing of this garment does not enable you to fly.(Oh go ahead! That's right, destroy a universal childhood belief.)