i've had a non lucid dream that involved me falling from like an avalanche or cliff and finding these people that lived in this town, felt like i was there for a few months like i built friendships and had a bond with these people, i wasnt in the dream and it seemed to go on for months but in reality it was only probably 15-45 minutes.. it felt more fastforward then actual time. When i have lucid dreams they can feel like a minute, or it can feel like an hour, it just depends on how far you are into your sleeping stage, and how much control you have in ur dream