Slash, lead guitarist for the rock band Guns N’ Roses, jammed with the young performers of the Broadway musical School of Rock at a rehearsal of the show, according to Rolling Stone.

The leather top-hat-wearing Slash (real name Saul Hudson) took time off from his band's New York tour dates to surprise the young performers and jam with them on Guns N’ Roses' “Sweet Child O' Mine” and “Paradise City.”

Watch a clip from the rehearsal here:

The magazine quoted the guitarist as saying, “It was really cool to meet such an enthusiastic and talented bunch of young rock ‘n‘ rollers. They were great kids as well as players.”

The Andrew Lloyd Webber musical tells the story of a substitute teacher who transforms a classroom full of straitlaced private school students into a cooking rock band.

The kids performed on the Tony Awards, and enjoyed a previous surprise appearance from rocker Stevie Nicks, who is used for a plot point in the show.