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[Wally raises a hand to his mouth in an attempt to stop any laughter that wants to escape at Bart's reaction to the idea of being married - he imagines it's the same look that every guy who woke up in a crummy hotel room in Vegas and found out they were hitched would have - but any chance he had of not laughing ends the moment he hears Bart swear.]
As serious as a heart attack. [Man, he almost wants to make up a story about Barry having kids just to see how Bart would handle that, but he'll take pity on the guy for now.
After all, Bart did say he'd pay for their food if that was a thing here.] You're just saying that because it is free. [He's teasing, of course.]
So have you figured out where you're going to stay yet?