"Want another cookie? There are still some left."
"I'm still full, but thank you! By the way, what was the occasion?"
"Oh, I don't know. A friend of mine just told me that Mercury is in retrograde, and that I should be careful."
"...so you got cookies?"
"Well, she said that it's a time when business deals and friendships and stuff are likely to go bad."
"...so... you got cookies. *chuckle*"
That was, if not the best reaction I've ever seen to the Mercury in retrograde crap, certainly the tastiest.