From the (poorly scanned) pages of Starlog Magazine #268 (pg. 22 to be accurate) comes a “crossing the streams” gag - where one universe merges somewhat with another.
In this case, it's Vader sporting a new life support control box in the form of Dr. Theopolis from Buck Rogers In The 25th Century (Universal, 1979-1981). And thus, Vader's trademark breathing sound now sounds a lot like Twiki.
FYI: from 1998, my pen name for my gags was "B.B.B." (Big Bad Bubba) until 2006 when my BortQ. pseudonym took over.