Side roll, definitely. It keeps the core body in motion, so reflexes stay sharp, whereas the back or pillow positions let the body settle. Designers could tweak reaction windows a bit if they notice a pattern of players falling asleep when their avatars are too relaxed—think of it as a mechanical “cat nap penalty.” For snacks, stick with something low‑glycemic to avoid the sugar crash—nuts, a protein bar, or a piece of fruit with a bit of peanut butter. Keep it simple and ready to consume quickly.