BTW Caroline I've been meaning to make this comment about the third pig's demise for awhile. When the boulders are rolling down the mountain if you listen to the sound effects very carefully I think there may be a couple of soft squelchy sounds very faintly that could be meant to imply the sound of the boulders literally crushing the poor leader to pulp against the mountain track.
Well the sketch is dark in itself and the noises of his buddies bouncing down the mountain were very real so I thought it could very well be realistic squashing sound effects. I don't know whether to thank goodness I'm not a muppet pig or to wish I was so.
On the one hand I certainly wouldn't want to end up like that but on the other hand muppets can survive easily and it may be kind of fun if I was a muppet of any sort eh?