If Alucard enters a screen freeze state while moving away from the end of a screen at the scrolling point then exits the screen without going further away, that causes an underflow in Alucard's X coordinate room index to be offset on the next screen effectively causing him to appear on the other side of where he usually would. This can also cause you to be placed inside of a wall, causing you to zip downwards. This glitch is sensitive to subpixel values so a setup is required to assure a successful attempt for both activating the screen freeze and for exiting the room. Depending on the setup and subpixel values this trick can have a 2 frame window instead of one frame.