I remember back in my college days, I had a history final. It was going to be on this book about some ancient greek guy, and I hadn't read it, despite the 5 weeks we'd had to accomplish that.
I stayed up all night and read that entire book, some 400 pages. Felt pretty proud of myself, except for the fact that my alarm didn't wake me up from my deep 1 hour of sleep.
I passed the class after much pleading and begging after taking the exam later that day.
Don't let that happen to you. The Screaming Meanie 220 WILL wake you up. 120 db of sonic thunder will surly jolt you out of the deepest slumber.