The show must go on --  even when you’re bleeding.

On Tuesday’s  The Daily Show, Jon Stewart badly cut his hand while taping a skit about his friend, Rep. Anthony Weiner, but ever the pro, the funnyman kept on going anyway.

Stewart injured himself when he broke a glass and gashed his hand while filming a bit that had him mockingly reenacting Weiner’s news conference on Monday in which he admitted to sending lewd photos of himself to six women.