Oh yeah, how lot of times it happened to me, on the school. I was excited about practice, or something happened and I was too hyper as well.
And when simply I didn't want to go to bed and I stayed awake until 1-2 am, you can imagine how I could wake up at 5.
Or when I watched Kubot until 4 am.
After a long tennis match it is also impossible to fall asleep right away.