If you spin around too much and get dizzy, there's a good chance you'll lose your balance and maybe even fall down. Never try to get dizzy in the kitchen, or anywhere indoors.  The best place to get dizzy is outside, where there's plenty of grass and room to move around. Falling on the grass is ideal. If you have to be indoors, make sure there are no objects or toys on the ground, and that you're far enough away from furniture and walls that you won't get hurt. Don't spin so much that you'll fall down and you won't have to worry about getting hurt. Usually 7-8 spins will be enough to get you dizzy. You don't need much more than that. It's very hard to control your fall when you're super-dizzy, so it's easy to break a wrist or an arm, or hurt yourself worse. Dizziness and nausea are related. Unless you want to see what you ate for breakfast again today, don't make yourself dizzy if you've eaten something in the last hour or two. It's very important to have someone around if you're trying to make yourself dizzy. If your hurt yourself, someone who isn't all light-headed needs to be around to help you out, or steady you if you start to fall. Get your parents to watch you. If they say no, there's a good reason. Don't do it. If you're feeling too dizzy and you don't like it, just sit down and put your knees up and wrap your arms around them. Put your head in between your knees and just breathe deeply. Dizziness can be a sign of lots of different health problems, including blood sugar problems, eye problems, nerve problems, and imbalance in your inner ear. Dozens of kids in schools all around the world die each year from self-choking to get a "high." Cutting off the oxygen to your brain is extremely dangerous, and can result in serious long-term brain damage, heart problems, and even death. It's not a "high" that you feel, it's your brain dying from lack of oxygen. Don't let any kids at school try to talk you into it, or tell you that "it's not a big deal" or "it's a totally legal high." It's a really easy way to kill yourself accidentally.
Make sure the area is clear of obstacles. Don't over-do the spinning. Never get dizzy on a full stomach. Never get dizzy by yourself. Sit down if you feel nauseated. Never hold your breath or choke yourself to get dizzy.