On the live album An Evening Wasted With Tom Lehrer
, there are a couple of instances of audience laughter that are unexplained to the listener. After the line "To thee we sing with our glasses raised on high," Lehrer would "toast" with his eyeglasses. After the line "Soon we'll be sliding down the razor blade of life," Lehrer would rub his buttocks in mock pain.
Sean - Chicago, IL, for above 2