Two "Little People" ..or so they reckon.
This version is edited...there is a lot more that heppens in the routine they did not show...
And there are other versions around, where the "legs" walk off by themselves, he gets a member of the audience up to see the "top half"...
EDIT
heres the full version...where you can see some changes in clothing of the performers before the "putting back together"
_http://www.youtube.com/watch?v=-qFu6i08f9w