There was a movie with John Lithgow that he hooked up electricity to his tongue for a high? What was that?

Answer 1

It is The Adventures of Buckaroo Banzai Across the Eighth Dimension.
John portrays Dr Emilio Lizardo, an adventurous scientist who, in 1938, in an effort to penetrate the eighth dimension using a primitive oscillation overthruster, became occupied by the evil Red Lectroid, Lord John Whorfin.
Lithgow's famous line from this wacko cult film is:
"Laugh while-a you can, monkey boy!"

Answer 2

The movie is called "Adventures of Buckeroo Bonzai"

Answer 3

might be the adventures of buckaroo banzai across the 8th dimention