How come Clip Art's that move are stationary once downloaded?

I'm trying to download a guy who is cutting a log with a chainsaw - it
shows 
movement.  I want it to move in my Word File.  I download it, insert it in
my 
Word file, and he doesn't cut the log or move like before you select it? 
How 
do you get it to keep the motion?
-- 
Thank you,

Karen