<human>: Condense the text into a few key points

This was back in 8th grade, in wood shop class. My friend, (let's call him Kyle) taught my other friend, ( let's call him Mike) and I, how to make ourselves black out. DO NOT TRY THIS AT HOME. A simple process of kneeling down, hyperventilating, then standing up after about 30 seconds and putting your thumb in your mouth and blowing (like blowing air into a balloon) then you gain consciousness a few moments later. Me being my curious and stupid self, it sounded fun at the time, so of course I tried it in the middle of the class period. So I do everything Kyle told me to do, and just like he said, I woke up from consciousness with my head down on the table. We were all laughing and entertained by this stupid thing to do. So Mike told me to do it again, so I thought okay no big deal, this is kind of fun. So I go through the steps again, and this is where the major fuck up happens. I wake up laying flat on my face, slowly regaining my vision and hearing. I look up from the concrete floor to see the entire class and the teacher circled around me. At this point I was thinking "Oh shit this is not good". My teacher grabs me by the arms and pulls me up and walks me to the bathroom to wash my face off. I didn't know why I needed to do that until I saw my face when I looked in the mirror. My mouth and nose were covered in blood, and my tongue kept poking something sharp. I open my mouth to see two of my teeth chipped completely in half. Fast forward about 45 minutes, and my mom shows up, and she is *livid*. She takes me to the dentist to see what they can do, and I get an appointment to get my teeth fixed two weeks later. Needless to say the bill wasn't cheap. And that's my story of making myself pass out in wood shop and costing my mom a lot of money to fix my teeth.
<bot>: My friend taught me how to make myself pass out in wood shop class, and I wake up with 2 teeth broken in half after doing so, costing my mom a good amount of money to get them fixed.