Boojums and children

A few nights ago, restlessly, I dreamt about a boojum coming after me and my sisters. It was a strange, dark, gray dream and it was floating around outside the windows of a run-down Victorian house. I was running so fast down a flight of rickety stairs I thought I was going to fall and die. But in the end, I think I did it. I woke up and it was too early so I fell back asleep, but I did not remember my dreams again and when the alarm rang, the bits from the first dream were already growing vague on me. I felt completely woolly-headed.