Just thought it might be interesting to point this out....
During the filming of The Muppet Show, Jim Henson would encourage performers and crew members not to hold back from laughing while it was being shot, since they would just be adding a laugh track in later anyway. The first laugh you'll always hear is Richard Hunt's. I think everything about the Muppets and everyone around him entertained him possibly more than anyone. I noticed this last night while watching the episode where Statler brings the plant backstage, trying to meet Valerie Harper. During the show, they play the Swedish Chef sketch where the Chef hits the talking chocolate cake with the baseball bat (of course, the cake was performed by Richard). At some point before we ever hear the cake talk, the Swedish Chef does something where Richard just cracks up. And they didn't even add the laugh track over it, so all you'll hear is Richard laughing.