Jimmy Fallon should consider gifting his long-time friend Jack Black a belt. The star of “A Minecraft Movie” made an appearance on “The Tonight Show Starring Jimmy Fallon” Monday night, where he played an energetic guitar solo to the crowd and lost his pants in the process,

Jack Black experienced a slight wardrobe malfunction during his Monday appearance on “The Tonight Show Starring Jimmy Fallon.” The actor, 55, came out while playing on an electric guitar, but as he danced up the steps his pants fell around his ankles, showing off his black and red boxers.

Jack Black gave The Tonight Show audience much more than they bargained for on Monday (March 31) evening as he flaunted his multi-colored underwear while greeting host Jimmy Fallon. Black arrived fully clothed in a colorful button-down and black pants as he shredded a Minecraft guitar while walking through the audience and to the Tonight Show stage to promote A Minecraft Movie,