What?

David: [puts my important mass spec papers on Julia's back]

Marina: No! Don't put those there. Those are important

David: Maybe you’re worried about the papers being dissolved by julia’s acidic back fluid.

Marina: [indignant] Julia doesn’t have any back fluid!

David: Why would you be worried about the papers then?

Julia: [loses it]

also...

David: You guys can carry the bats. I’ll have the spunk… I mean balls.