The (one and only) upside down kiss is from I've Got You Under My Skin - when Woody Samms transfers souls with Clark.
A lot of my favorites come at the ends of the episodes, and in my opinion end far too soon! ;P
Like the end of Twas the Night Before Myxmas
Lois: It's happening.
Clark: What?
Lois: This... this magic. It's just like you said. I mean... I may not be able to see through walls, but right this second, I feel like I can see everything through your eyes.
Clark: Well, then you're the lucky one, 'cause I'm looking at you.
Gaaah!! Gets me every time.
Then there's the end of Chip Off the Old Clark. Lois and Clark are in the newsroom, and Lois says, "So what's normal for a woman happily engaged to a really cute guy? Oh, I know!"
Then they kiss and cheers erupt from around the newsroom.
Clark pulls barely an inch away and says, "Lois, everybody's watching."
She says, "Yeah... who cares?" Then goes back to kissing him.
I just think it's so *adorable* how shy he is about it, though Lois manages to make him forget about it.
Great thread, Mara!
Sara