Dave the Gnome
Isn't it great when you can get your witty response into a situation (if you can remember it at the time that is!!)

My two favourites that I do try to use....much to the annoyance of others are......
In the local DIY store when buying paint and the assistant asks you if you would like it in a bag? You say "no thank you, just leave it in the tin!!"
The second is when you are buying a round of drinks in a bar and are trying to carry several glasses at once, the barman says "would you like a tray?" and you say "don't you think I have enough to carry??"

all the best, Yvonne (Sandy)