This guy changed a fundamental aspect of a common conversation exchange forever. He didn't even know it. This dude walked by while on the phone (could have been with his mom I have now idea) and said "Why was it good. No, I'm asking why was your day good..." I NEVER THOUGHT OF THAT BEFORE! I've always asked "hows your day going".. I then get the typical "oh it's good" then get stuck. What an amazing way to really get them to think about what they just said, and give you talking points. You can then use conversation threading (something I've picked up on here) to take that one thing that made their day "good" and expand off of it. Perfect opener, I love it. It could even be used at a bar/club: "hows your night going"? I guarantee you'll get the "pretty good" or "good". Then ask why. It's actually a pretty deep psychological question if you think about it. It makes them assess their current situation and maybe they're not "good" but having a downright shitty time. This could be an opportunity for them to vent. Anyway, maybe I just had too much caffeine today. I just thought I overheard a stroke of genius and thought I'd share/see what you guys thought.

EDIT: Front page! Wow. Thanks for the upvotes and comments guys. I'm a super newbie so this feels good to be part of a community who's here to help.