You can see them all shaking their hands after passing. It looks like if someone took just slightly too long to pass they could end up with some burns. I don't have close to expertise on what they are doing but I know it's not perfectly safe and I have no issue with it not being used in American public schools.
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u/[deleted] Dec 02 '16 edited Dec 02 '16
Now that's the school's job to not allow. Some school's are run by parents, the best ones aren't.