Mason Jar Blender Trick

I came across this on Facebook and loved the idea so much I wanted to share it with everyone. Click on the link and check it out. http://www.thekitchn.com/the-mason-jar-blender-trick-do-you-know-about-this-195182.  I am going to try it myself since my bullet base broke and I can't make individual smoothies anymore on it.  I will post my results soon.  If this trick scares you by all means don't try it.