This works with ANY episode of "Whose Line Is It Anyways?" - many can even be found on Youtube.
I show this near the start of the Improv unit to get them really psyched about it, and to show them that being dumb (and not TRYING to be funny) is a really important part of this unit.
They really see the SKILLS that these improv actors have - yes, it's fun and spontaneous, but there's also an art to it.
Check out my other improv stuff in my shop! (it's my favourite unit)