These are not all original t o me but here goes ....
In the supermarket they sell bottles of liquid labelled "Still water". At what stage will it cease to still be water.
And talking of water, one brand says it has percolated and been filtered through rock for thousands oof years before being bottled. Good job they bottled it when they did as its best before date is only in a months time.
What does an occasional table become when it is not a table.
Who did the first person who bought a telephone want to ring?
Where did the first person who bought a car buy petrol from? Or who did the first filling station sell petrol to?
How many people died eating poisonous mushrooms and berries before they knew which ones were ok to eat?
There are many more, so what are other contributors favourites?
Some things are described in pairs: A pair of trousers, or a pair of scissors. What does one trouser or one scissor look like? (When I was at school we also had a 'pair of compasses' but that seems these days to have transmogrified into a 'compass') We also had a 'pair of dividers' so what did one divider look like in this case.
I also remember being told I was 'next to an idiot'. I didn't think this was a polite way to talk of my friend.
Also, in places that provide accommodation for eating food, it often says 'customers must not eat their own food'. I don't think a customer would appreciate me going and taking their food ...