The Skeptical Teacher

Musings of a science teacher & skeptic in an age of woo.

Posts Tagged ‘glass walking’

I’m Now a Believer in Chi

Posted by mattusmaximus on March 29, 2010

Well, I don’t know about you, folks, but I’ve been converted from a skeptic to a believer in chi, ki, qi, qi gong, “life force energy”, or whatever you want to call it.  I know that many times I’ve stated publicly on this blog that, whether you’re talking about breaking boards, laying on beds of nails, or walking barefoot on glass shards, such amazing physical feats have absolutely nothing to this chi stuff, but I can do so no longer.  You see, I’ve been convinced by irrefutable & unquestionable evidence that this chi business is the real deal.

So how was I, a die-hard skeptic, convinced of the undeniable reality of chi?  Simple really… I just saw the most amazing video on Youtube!!!

Wow… now I might have to give all that stuff about crystal power a second look, too.

Hat tip to UncaYimmy from the JREF Forum for sharing this little gem of a video with me.  It was so cute I had to pass it along 🙂

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Posted in humor, physics denial/woo | Tagged: , , , , , , , , , , , , , , , , , | 2 Comments »

Walking Barefoot on Broken Glass – Not Paranormal, Just Physics

Posted by mattusmaximus on March 14, 2010

While at Skepchicamp 2010, one of the woo-busting physics demonstrations I performed was that of walking barefoot on broken glass shards.  Here’s a close up of the action…

This is a standard carnival trick, also used by various New Age gurus to display their supposed mystical, paranormal, or supernatural powers to their gullible followers.  Sorry folks, no woo is required to explain this (pardon the pun) impressive feat.  This is some video shot by a few of my students earlier this year when we were discussing the physics of pressure

It can all be explained with a simple understanding of basic physics: by walking flat-footed on the shards, I spread my body weight evenly over the entire surface area of my feet, which means that I’m touching a large number of glass shards at once. Thus, since my weight is distributed over so many points, the pressure (force per unit area) at any one of those points is so small that it isn’t enough to stab or cut through my skin.

Thus, through a simple application of Occam’s Razor, we can conclude that nothing paranormal is required to explain what’s going on, just good physics!

Posted in physics denial/woo | Tagged: , , , , , , , , , , , , , | 5 Comments »

 
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