I had this dream once where there were giant spiders hanging down from the ceiling above my bed as I slept; the dream felt so real that when I awoke from the dream I actually scanned the entire area around myself and my bed, checked the mosquito net around the bed and couldn't go back to sleep again 'cause I felt so uncomfortable.
I don't like having spiders near me (and certainly not hanging above me so they can drop and crawl over me whenever they feel like it! >.<), so after that dream I couldn't help feeling, sort of, paranoid for quite some time.
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Ever had a dream or nightmare that felt so real it had you dazed for a while after you awoke? Let's share some of those!