Panel 1: We find ourselves watching Mike on shift reminding himself what an interesting business running a hot dog stand is.
Panel 2: One stands on the corner, watching the endless parade of Life as it passes by.
Panel 3: He then wonders what it's all about. His reverie is interrupted by Walt telling him to look busy.
Panel 4: Mike is taken aback because he didn't expect the answer to his question to be "We're here to make a few bucks, remember?"
He is also mildly surprised because Walt's face (as Twelve said before s/he became Thirteen) is all over the place.
Summary: In the television adaptation, the upcoming mess with Dave was turned into Walt explaining how little money he actually made running his business and Mike Learning An Important Lesson: "Small Businessmen Take It In The Nads: OFFICIAL." In the original, Dave is simply not cute enough to bend the rules for.