Kevin Hart and Tiffany Haddish are two of the funniest people in Hollywood.

The hilarious comedians took roller-skating lessons with L.A. Roller Girls for Hart’s Youtube Original series What The Fit, in which he works out with his famous friends such as Conan O’Brien and James Corden.

The two learned how to do the moonwalk and perform different fitness techniques on roller skates, all while bringing the laughs.

Check out the funny video below.