Dreamfasting is a Gelflings way of sharing memories. In a dreamfast, memories are communicated to each other in a sort of Stream of consciousness telepathic memory montage.

In The Dark Crystal, when Kira grabs Jen's hand to help him up, the two accidentally become dreamfasted and quickly learn of the other's pasts.

In Legends of the Dark Crystal: Volume 1: The Garthim Wars, Neffi dreamfasts with Larh to show him the horrors of the Garthim attacks on her village.