Quote Originally Posted by odd one View Post
Unfortunately, so many of these hands on real life demonstrations have been removed from the class rooms these days. It was the explosions, smoke and electrical arcs that kept my attention and got me thinking. I am so thankful I had teachers that were able/allowed to do those kinds of demonstrations back then. There is a huge difference between watching a video and seeing it first hand. Kids these days are missing out.

As to the original video and body experiments (though that video was a demonstration) - I remember when Col. (at the time) John Stapp came and spoke at our school. He was the first man to ride a rocket sled out at Holloman AFB. This is a man that gave his body for science, experiencing more than 40g's to help advance ejection seat technology. https://www.popsci.com/blog-network/...cket-sled-man/
That reminds me of another demonstration in the same class, this time by a school resource firefighter, showing us the dangers of screwing around with gasoline. He had a steel container (from my dim memory of 7th grade) roughly the size of a insulated coffee cup. He pulled out a eye dropper, put one drop of gasoline, covered it and shook it up. Pulled off the cover and dropped a match in window-rattlin BANG!

This is much the same way our welding shop teacher taught us the difference between oxy, acetlylene and oxy-acetylene.

Filled a baloon up with oxy, touched it with a hot welding rod: POP!
Filled one up with Acetylene, touched it : FOOMP. Big yellow fireball, acetylene soot floating everywhere.
Filled one up with Ocy-Acetylene, then told us to pay close attention so we cold tell the difference...

He gave us a few minutes to regain our hearing and told us "THIS IS NOT SOMETHING TO PLAY AROUND WITH!"

(other lessons, like absently picking up a no-longer-red-hot piece of steel I'd been working on in the forge with my bare hand, because 16YO brain said "It's not red anymore, so it's not hot" he left for us to discover on our own... )