it 's funny , but when i 'm in my bunk , i feel the motion of the ship , of course , but the closest and most personal thing i feel is my face being pressed into the pillow as the ship comes up from a roll , and then not being pressed as the ship falls back down , and then pressed again , so it 's like there 's a hand on the side of my head mashing me down and then not and then ... and then there 's this tremendous crrraaaacccckkkkkkkk !