You are looking at a command called sit
site on|in|etc.. {object}
Causes you to site on or in or beside etc.. the the object eg:
sit on the sofa
Scripting info
This sends out the trigger word 'moves' as you are simply moving from one position to another.
if target of moves then saton
#saton:
print [$target] fees sat upon by [$init_obj]