yep on my trip on a ship to greece i woke up early int he mornin and had sum hot coco and i felt i was still tired so i went to sleep and i had bout 2 or 3 lds shame 2 of em i couldn't move or talk 3rd one i could but it last for a few seconds so what you do is stay up all night and when you hit dead ass tired state drink some hot coco and then stay up for a lil bit more then goto sleep you'll have a ld