Because Chewie was making too many wookie mistakes!
Some days the wind doesn't blow.
About a day.
Han Double
Han shot first.
Two. One to change it and one to yell "Ta-daa!" when he's done.
She kept on sitting on Pinocchio's face yelling "Lie to me, lie to me!"
WWWRRRRRRGWWWRRRR!
He's just a wookie!
Chewie (You have to be a Star Wars fan)
A Wookie mistake!