Does anyone else have really vivid dreams after waking up once in the middle of the night , and right before they wake up ? I always sleep in 4-hour cycles .... whenever I fall asleep , I 'll almost always wake up 4 hours later , even if it 's just for a minute or two . Sometimes I 'll groggily go to the bathroom and fall back into bed and be back asleep a minute later . That is always when I have the really crazy , vivid dreams . I had one last night , and now I ' m trying to remember all of the details .

Give answer the following question using evidence from the above passage: What may be a fact about this person ?
They tend to wake up in the middle of the night .