They dropped off to sleep talking of how they should get Sarah's address.

According to Young, sleepwalking covers a spectrum of actions from sleep talking to getting out of bed.

Lara snorted in her sleep and I wondered what my nights would be like without the constancy of her breathing or her sleep talking.

Conditions like sleep walking and sleep talking are well known, there are even documented cases of driving and committing murder (homicidal somnambulism) while asleep.