Stage Fright

You might expect fans of Madonna to storm the stage at one of her concerts . . . but during a performance of “Speed-the-Plow” on Broadway?

It happened on Friday the 13th: Madonna was on stage doing her regular turn as a temp secretary in the David Mamet play about Morality Hollywood-style when a stranger approached her from the wings. Madonna froze, said a member of the audience, but co-stars Ron Silver and Joe Mantagna remained heroically professional.

According to our source, Silver turned to Mantagna and ad-libbed, “What is this, one of your tricks?” Mantagna then threw the intruder out of his “studio office”--into the waiting hands of a stage hand.

A spokesman for the show said police were called but no charges were pressed: “We’d prefer not to talk about it at all. It’s a potentially very scary situation, so we’re keeping the incident very quiet.”