You move to the first side, he moves to the other side.
You then take your jacket and drape it over whatever is handy, a bush or small tree.
Then you move to the other side.
Squirrel moves to the first side, sees the jacket and thinks it's a human, so he moves back to the other side, where you are. BAM!
Hah! I would use my borzoi to distract the squirrel to run around the tree where I was waiting to spook him again.
Great fun!