I never watch or even ever check to see who's on Leno but I somehow caught it last night before I went to bed, programmed it to record then was dissapointed this morning to see it basically only got to that first 'tweety-pie' before cutting off.

I guess this is why when I used to DVR Fallon at my old place I always got the end of Leno's musical guest (and it was usually enough for most of the song).