I'd never heard of it either. Don't even know for sure if it's true or not, really. Something a girl right out of bootcamp told my brother. I'll know in about 2 weeks if it actually goes on.
The Only Time I Remember Going Without Sleep was the Night Before a Philosophy Exam... And the Day I Found Out my Father had been Killed... Apart From them...The most I Can Go Without Sleep is About 18 Hours...Which I Then make for in Alot of Naps the Next Day...