A Hospital Flip is similar to a Casper Flip. In a Casper Flip you turn the board onto your foot (grip-tape to shoe laces) with your "sliding" foot, and rotate the board back with a 180° turn with your back foot. A Hospital Flip still turns the board, grip-tape side down onto your foot, but then that same foot pushes it back right-side up with a 180° turn, instead of using the back foot.
1-set up just like a kickflip with you front foot in a 45 degree angle or however you do yours
2-pop it just like a kickflip
3-Now heres the hard part-- as soon as it's spun so your trucks are facing up with your front foot, you're gonna catch the board and kick it out
4-now pull your feet up into your chest so that they don't hit the board
5-place both feet on the board and roll away