Here's how I started this series of images, and here's "Yes!" Moment #6 from Magnolia (1999).
"This is something that happens." Yes, Stanley, you know this is something that happens because you know just about everything there is to know. (I knew this is something that happens, too, but with smaller frogs, I thought.) And the fact that you know you know so much is going to give you the self-confidence to stand up to your father. This is your triumph.
This appears in a climactic sequence that is full of "Yes!" Moments. And anyone who thinks Tom Cruise is not a good actor should watch this movie. Just posting this image is spurring me to watch Magnolia again. (My favorite Juilanne Moore performance.)
This series could go on forever. I haven't even gotten to classics like Hilts jumping the fence in The Great Escape or any single moment in the chariot race in Ben-Hur - and on and on. But this has been a fun series to do, and just doing it has pumped up my addiction for the thrill of cinema.