I waas in an unfamiliar forest, it was autum or winter. As I stood, several giant snowflakes were materializing out of thin air at chest height. they didn't move and stayed in one spot. I tried getting closer but they moved away or disappeared just to reappear at some distance. I managed to run into one at full speed and my legs felt extremely chilly. Tupper commented they wiere likely -20 if not -30°C cold. The cold persisted for a moment after I woke up though it wasn't cold in the room at all.