If you spend too much time listening to people yap on TikTok, you’ve probably come across a few “Things I Would Never Do As A…” videos, wherein people, such as doctors, nurses, neurosurgeons, and paramedics, share the things they would never do as experts in their fields.

Their takes are so enlightening and fascinating, so the BuzzFeed Community was asked to share all the seemingly harmless, but possibly risky things we all do way too often.

We had everyone from car mechanics to attorneys to everyday people write in.

Here are all the best insights:

1.”I am a physiotherapist and I would never do full sit-ups. Traditional sit-ups cause microtears of the lumbar discs. By the time you reach your 20s, they can be easily herniated from something simple as bending over. There is a ton of research about this and yet they make kids do them at school. Do planks!!! They are better for your core and no trauma to the spine.”

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2.”As an attorney, I would never talk to the police. Period. Full stop. Too many innocent people get drawn into situations because they’re trying to be helpful or don’t feel comfortable just walking away from police. If you aren’t under arrest, the most police can require you to do is identify yourself. Otherwise just shut up and walk away.”

3.”A good friend of mine works for the Board of Education. She educates teachers, teaching assistants, and anyone who interacts with children on how to keep them safe. Not wearing a bike helmet is the #1 cause of traumatic brain injury in children where we live second only to motor vehicle accidents.”

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