Benedict Cumberbatch got to test out his New York accent during an intense game of Mad Libs with Jimmy Fallon last night.

The pair giggled their way through an interrogation scene using random words and phrases (like flibbitty gibbet) chosen by Cumberbatch. The Doctor Strange actor took on the role of Detective Rory, who questioned Fallon’s Ukrainian character for the theft of 4,229 eggs.

Check out the nonsensical hilarity below.