Answer:
The sentence is Intransitive.
Explanation:
Reason being is because the sentence still makes sense without the verb 'slowly', therefore it is an Intransitive sentence.
The quote 'What had happened was originates from a stand up act performed by Richard Pryor and was used by Will Smith in The Fresh Prince of Bel Air show.
Richard Franklin Lennox Thomas Pryor ( was an American stand-up comedian, and actor. He reached a broad audience with his trenchant observations and storytelling style, and is considered as one of the best and most influential stand-up comedians of all time.