Mine just refuses to give up whatever random thing he's holding when gets tired. Lately he's slept with spoons, his toothbrush, the temporal thermometer, a spatula, rubber duckies, and the wooden hammer for his peg pounding toy.
DD usually sleeps on her back with her arms above her head and her legs propped on something. Anything, the crib, her kitty, us if she's in bed with us, a pillow, the wall, her other leg is a popular one.
Butt in the air as well. She also LOVES to put one leg up and has no hesitation sleeping sideways when she's in bed with us and has one foot propped up on my face
Re: Weird ways your baby sleeps
But mostly LO is a butt in the air sleeping on both his arms (like rabbit explained) kind of guy.
DS born 6/2013