Jack Black made quite the entrance on “The Tonight Show” on Monday night, as he is known to do, but this time, the man actually lost his pants while doing it.

Of course, this being Jack Black, he rolled right along with it, shaking his hips to live music from the Tonight Show band and leaning in to give Fallon a big hug, still pants-less.

Jack Black's Pants Fall Down as He Greets Jimmy Fallon During“ Tonight Show” Entrance: 'I Didn't Bring a Belt' The 'Minecraft Movie' actor showed off a pair of black and red boxers while ...

Jack Black let his “Master Exploder” hang out on Instagram. The “Holiday” star and his Tenacious D bandmate, Kyle Glass, posed nude on social media Friday to announce the return of their ...