I love Spilotes pullatus pullatus. Especially when they spread their necks!
http://www.primareptilia.com/gallery...e_10.sized.jpg
http://www.primareptilia.com/gallery...y_37.sized.jpg
http://www.primareptilia.com/gallery...y_14.sized.jpg
But my FAVORITE thing to find them doing is This:
http://www.primareptilia.com/gallery...ch_8.sized.jpg
Or this:
http://www.primareptilia.com/gallery...10_2.sized.jpg