“What are you babbling about?” Kimmel asked. 

He offered a theory on why the former president was randomly speaking about Full Metal Jacket at a factory that makes metal cages and walls for computer systems. 

“He heard the word ‘metal,’ and he just went on a roll from there,” Kimmel said. “I don’t know about the jacket, but he is full mental for sure.” 

See more in his Tuesday night monologue: