In related news, Choking Jabba, Dying Tauntaun is also the name of an upcoming Star Wars standalone movie to be directed by Ang Lee, featuring the in-universe martial art of Teras Kasi.
(No it isn't.)
You might think the obvious "Darth Hader" puns would have led Bill a different way when it came to impersonations. But no - dying puppets it is. And he's great at it.