Kudrow, on her end, couldn't handle the unexpected loud pops and booms. "I don't remember anything because there were loud noises and it gave me amnesia," she joked.
"She gets scared and she doesn't like loud noises," Cox chimed in.
Black and Stiller serve as executive producers of the special that airs Thursday on NBC at 8 p.m. ET/PT. Celebrity Escape Room benefits the sixth annual Red Nose Day to end child poverty. For more info, visit https://donate.rednoseday.org/.