Former "Friends" star David Schwimmer threatened to storm off stage on the opening night of his London play "Some Girl(s)" - because he spotted a paparazzi photographing him during a semi-naked scene.

Schwimmer complained the snapper ruined his West End debut in Neil LaBute's play by taking non-stop pictures from the stalls of Gielgud Theatre, in a sequence which involved the 38-year-old stripping down to his underwear, reports the Internet Media Database.

"I was the only person who saw him and because I am on stage all the time I couldn't tell anyone, but I was willing to walk off," Schwimmer said.

When asked if he thought the photographer had purposely come to catch him in his boxer shorts, he replied, "I don't know, but if he did, he needed a giant lens."