Similar to the other animation, though this shows the expression presentation-type of the data and the foobar presentation-type in the article of the data (they are obviously the same, but the latter has a box around it as written)
The McCLIM application-frame from the other image, but shown in context in front of an emacs slime repl behind it. The mouse moves over the presentations: The "expression" presentation-type is seen to be naturally sensitive (a box appears around it when moused over)