Okay, I just have to say a bit about headtilt.com, because it's just too funny. This site analyzes Spike's various head tilts ... the circumstances, the nuances, the emotional meaning, etc. Really really really funny obsessive stuff. Plus the site also has videos and a fascinatingly informed section about medical details on BTVS. I highly recommend this site ... extremely entertaining and unique! A brief quote from the analysis of "Life Serial": "This may be one of the greatest head tilting episodes of the season. The crypt scene deserves some kind of award. Most people would lose their balance if they stayed tilted that long. I'm going to put up clips and measure angles because I believe his head tilts almost 90 degrees."