Because Chewie was making too many wookie mistakes!
Elf and safety
Tooth-Hurty
A wookiee talkie.
He was petrified.
Two. One to change it and one to yell "Ta-daa!" when he's done.
A right a right a right!
A Chewie
They're a little Chewie. (Edit: Wookiee***)
A Wookie mistake!