Right now I'm watching Seven Brides for Seven Brothers, one of my favorite childhood musicals. I always loved how people would start singing for no apparent reason, and nobody around them seemed to thing it odd. Those were good times...
Time to spice things up around the office: I'm going to launch into song sometime tomorrow and see if others join me in a little dance and harmony.
(oh yeah, and this is the most un-PC movie I think I've ever seen)