I mostly reply that I rarely show. BTW I rarely show if some folds except in the case where a opponent I play with a lot and I respect folds a big pot and shows their cards. This happens about once or twice a month.
A simular situation is when someone asks " do you want me to call ?!?" . It's often the question of real time waisting hollywood types. A dude who fits this description asked me "do you want me to call ?!?"(I shipped my remaining $50 into about a $300 pot otr) to which I replied "I want you to hurry up, that's all I want ! NOW HURRY UP !!" I did it in a jokey kind of way and everone laughed including him. Anyhow incredibly he stopped pissing about after that and played with an agreeable flow. It's nice when it all works out