Arkansas scientist Kevin Delaney will return as a science expert on The Tonight Show with Jimmy Fallon on Friday, according to the Museum of Discovery.
Delaney, who works as director of visitor experience at the Little Rock museum, will mark his fourth appearance on the late-night talk show.
According to the Museum of Discovery, Delaney was selected to appear on The Tonight Show after the show contacted more than 50 science museums across the U.S. last year.
Delaney's appearance comes a day before the Museum of Discovery is set to host Tinkerfest from 9 a.m.-3 p.m. Saturday.
Delaney first wowed Fallon with his educational science experiments in May 2014 by blasting smoke rings into the audience from a "vortex cannon," the Arkansas Democrat-Gazette reported.