Who's on first?

This Spaceballs gag reminds me of Abbot and Costello's gag "Who's on First"?

I could use a laugh after all this political stuff.

By the way, what do you see in this picture?  It is not as obvious as you might think.  It is an illusion.

I got it off the wikipedia article about paradigm shifts.

While I was at it, I read up on the phenomenon known as Groupthink.  I was wondering if the two terms were connected in some way.  Maybe a paradigm shift can occur if groupthink leads to a major screw up.